General functions for human survival and mortality

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物质对人的生存很重要英语作文

物质对人的生存很重要英语作文Human beings rely on various substances for survival. From the air we breathe to the food we eat and the water we drink, our existence is intricately dependent on the presence of different substances in our environment. In this essay, I will discuss the critical importance of these substances for human survival.First and foremost, air is a vital substance that we need for survival. The oxygen present in the air is essential for the process of respiration, which allows our bodies to produce energy and sustain life. Without access to clean and breathable air, humans would quickly succumb to asphyxiation and perish. Furthermore, the air also contains other important gases such as carbon dioxide, which is necessaryfor the process of photosynthesis in plants, a crucialcomponent of the food chain that ultimately sustains human life.In addition to air, water is another indispensable substance for human survival. The human body is composed of approximately 60% water, and this vital substance plays a crucial role in maintaining bodily functions such as temperature regulation, digestion, and waste removal. Lack of access to clean water can lead to dehydration, which insevere cases can be fatal. Moreover, water is also essential for agriculture and the production of food, making it an indispensable resource for human survival on a societal level as well.Food is yet another critical substance for human survival. Our bodies require a diverse range of nutrients, including carbohydrates, proteins, fats, vitamins, and minerals, inorder to function properly and maintain health. Without an adequate supply of food, humans would suffer frommalnutrition and ultimately perish. Furthermore, food also provides the energy necessary for carrying out daily activities and sustaining overall wellness.Apart from these basic substances, there are numerous other materials and compounds that are essential for human survival. For example, the clothing we wear and the shelter we inhabit provide protection from the elements and help to maintain our body temperature within a safe and comfortable range. Additionally, medications and medical treatments are crucial for preventing and treating diseases and injuries, thereby contributing to human survival and well-being.In conclusion, it is evident that a wide variety of substances are essential for human survival. From the air we breathe to the food we eat, these substances play a fundamental role in maintaining our health and well-being. Without access to these critical substances, human survival would be severely compromised. Therefore, it is essentialthat we recognize the importance of these substances and work towards ensuring their availability for all members of society.。

水是生命之源我们的生活离不开水的英语作文

水是生命之源我们的生活离不开水的英语作文全文共3篇示例，供读者参考篇1Water is the source of life and our lives are inseparable from water. Water covers more than 70% of the Earth's surface and is essential for all living organisms. From providing hydration and maintaining health to supporting agriculture and industry, water is crucial for sustaining life on our planet.First and foremost, water is essential for human survival. Our bodies are made up of about 60% water and we need to drink water regularly in order to stay alive. Water is vital for various bodily functions, such as digestion, circulation, and temperature regulation. Without water, we would not be able to survive for more than a few days. Access to clean and safe drinking water is a basic human right and a key determinant of public health.In addition to human health, water is also essential for agriculture. Agriculture is a water-intensive industry that relies on irrigation to grow crops. Water is needed to hydrate plants, control pests, and promote growth. Without water, crops would wither and die, leading to food shortages and famine. Waterscarcity is a major challenge for many farmers around the world, especially in arid and drought-prone regions.Furthermore, water is crucial for industry and economic development. Industries rely on water for various processes, such as cooling, cleaning, and manufacturing. Water is used in the production of goods and services across all sectors of the economy. For example, the textile industry uses water to wash and dye fabrics, while the energy industry uses water to cool power plants. Without water, many industries would not be able to function and the economy would come to a standstill.In conclusion, water is the source of life and plays a vital role in our daily lives. From providing hydration and maintaining health to supporting agriculture and industry, water is essential for sustaining life on our planet. As the global population continues to grow and climate change intensifies, it is more important than ever to conserve and protect our precious water resources. By valuing and respecting water, we can ensure a sustainable future for ourselves and future generations.篇2Water is the source of life, and our lives cannot exist without it. From the moment we are born, water plays a vital role in everyaspect of our existence. It is essential for our survival, health, and well-being.First and foremost, water is crucial for our bodies to function properly. Our bodies are made up of about 60% water, and we need to constantly replenish this water to keep ourselves hydrated. Water helps regulate our body temperature, aids in digestion, and carries nutrients and oxygen to cells. Without water, our bodies would not be able to perform basic functions, and we would quickly become dehydrated and ill.In addition to its importance for our physical health, water also plays a significant role in our daily lives. We use water for drinking, cooking, cleaning, and personal hygiene. Without access to clean water, our quality of life would be severely compromised. Water is also essential for agriculture and food production, as crops need water to grow and thrive. Without water, farmers would struggle to produce enough food to feed the population, leading to widespread hunger and famine.Furthermore, water is crucial for the environment and the ecosystem. It is essential for the survival of plants and animals, and it helps to maintain biodiversity. Water sources such as rivers, lakes, and oceans provide habitats for a wide range of species, and they support the overall health of the planet. Without cleanwater, the natural world would suffer, and ecosystems would be imbalanced.Unfortunately, access to clean water is not a reality for everyone. Millions of people around the world do not have access to clean drinking water, leading to preventable diseases and sanitation issues. It is crucial that we work together to ensure that clean water is available to all, regardless of location or socioeconomic status. By conserving water, reducing pollution, and investing in water infrastructure, we can help to ensure that water remains a sustainable resource for generations to come.In conclusion, water is the source of life, and our lives are deeply interconnected with this essential resource. It is crucial that we recognize the importance of water in our daily lives, and work together to protect and preserve this precious resource. By valuing water and taking steps to ensure its availability for all, we can create a healthier, more sustainable future for ourselves and for the planet.篇3Water is the source of life. Our lives cannot be separated from water. Water is a crucial element that sustains all living beings on Earth and plays a vital role in our daily lives.First and foremost, water is essential for our survival. The human body is made up of about 60% water, and we need to drink water regularly to maintain proper bodily functions. Water is essential for digestion, absorption of nutrients, circulation, and temperature regulation. Without an adequate intake of water, our bodies would not be able to function properly, and we would eventually die. Therefore, water is the foundation of life, and without it, life as we know it would cease to exist.In addition to its importance for our survival, water is also crucial for various aspects of our daily lives. We use water for cooking, cleaning, bathing, and watering plants. We rely on water for agriculture, industry, and transportation. Water is essential for producing goods and services, generating electricity, and maintaining sanitation. Without water, our cities would not be able to function, and our economies would collapse.Furthermore, water plays a key role in the environment. It sustains ecosystems, supports biodiversity, and regulates the climate. Water is essential for the survival of plants, animals, and microorganisms. It provides habitats for aquatic organisms, serves as a source of food and livelihoods for many communities, and helps to maintain the balance of nature. Without water, thenatural world would be unable to thrive, and many species would become extinct.Overall, water is a precious resource that is vital for our health, well-being, and prosperity. We must value and protect water to ensure its availability for future generations. By conserving water, using it wisely, and preventing pollution, we can ensure that water remains a source of life for all living beings on Earth. Let us cherish and respect water as the essence of life and make every effort to preserve and sustain it for the benefit of all.。

研究生公共英语教材阅读B第3、4、10、11、14课文原文及翻译

Unite 3 Doctor’s Dilemma: Treat or Let Die?Abigail Trafford1. Medical advances in wonder drugs, daring surgical procedures, radiation therapies, and intensive-care units have brought new life to thousands of people. Yet to many of them, modern medicine has become a double-edged sword.2. Doctor’s power to treat with an array of space-age techniques has outstripped the body’s capacity to heal. More medical problems can be treated, but for many patients, there is little hope of recovery. Even the fundamental distinction between life and death has been blurred.3. Many Americans are caught in medical limbo, as was the South Korean boxer Duk Koo Kim, who was kept alive by artificial means after he had been knocked unconscious in a fight and his brain ceased to function. With the permission of his family, doctors in Las Vegas disconnected the life-support machines and death quickly followed.4. In the wake of technology’s advances in medicine, a heated debate is taking place in hospitals and nursing homes across the country --- over whether survival or quality of life is the paramount goal of medicine.5. “It gets down to what medicine is all about, ” says Daniel Callahan, director of the Institute of Society, Ethics, and the Life Sciences in Hastings-on-Hudson, New York. “Is it really to save a life? Or is the larger goal the welfare of the patient?”6. Doctors, patients, relatives, and often the courts are being forced to make hard choices in medicine. Most often it is at the two extremes of life that these difficultyethical questions arise --- at the beginning for the very sick newborn and at the end for the dying patient.7. The dilemma posed by modern medical technology has created the growing new discipline or bioethics. Many of the country’s 127 medical s chools now offer courses in medical ethics, a field virtually ignored only a decade ago. Many hospitals have chaplains, philosophers, psychiatrists, and social workers on the staff to help patients make crucial decisions, and one in twenty institutions has a special ethics committee to resolve difficult cases.Death and Dying8. Of all the patients in intensive-care units who are at risk of dying, some 20 percent present difficult ethical choices --- whether to keep trying to save the life or to pull back and let the patient die. In many units, decisions regarding life-sustaining care are made about three times a week.9. Even the definition of death has been changed. Now that the heart-lung machine can take over the functions of breathing and pumping blood, death no longer always comes with the patient’s “last gasp” or when the heart stops beating. Thirty-one states and the District of Columbia have passed brain-death statutes that identify death as when the whole brain ceases to function.10. More than a do zen states recognize “living wills” in which the patients leave instructions to doctors not to prolong life by feeding them intravenously or by other methods if their illness becomes hopeless. A survey of California doctors showed that 20 to 30 percent were following instructions of such wills. Meanwhile, the hospicemovement, which its emphasis on providing comfort --- not cure --- to the dying patient, has gained momentum in many areas.11. Despite progress in society’s understanding of death and dying, t heory issues remain. Example: A woman, 87, afflicted by the nervous-system disorder of Parkinson’s disease, has a massive stroke and is found unconscious by her family. Their choices are to put her in a nursing home until she dies or to send her to a medical center for diagnosis and possible treatment. The family opts for a teaching hospital in New York city. Tests show the woman’s stroke resulted from a blood clot that is curable with surgery. After the operation, she says to her family: “Why did you bring me back to this agony?” Her health continues to worsen, and two years later she dies.12. On the other hand, doctors say prognosis is often uncertain and that patients, just because they are old and disabled, should not be denied life-saving therapy. Ethicists also fear that under the guise of medical decision not to treat certain patients, death may become too easy, pushing the country toward the acceptance of euthanasia.13. For some people, the agony of watching high-technology dying is too great. Earlier this year, Woodrow Wilson Collums, a retired dairyman from Poteet, Texas, was put on probation for the mercy killing of his older brother Jim, who lay hopeless in his bed at a nursing home, a victim of severe senility resul ting from Alzheimer’s disease. After the killing, the victim’s widow said: “I think God, Jim’s out of his misery. I hate to think it had to be done the way it was done, but I understand it. ”Crisis in Newborn Care14. At the other end of the life span, technology has so revolutionized newborn carethat it is no longer clear when human life is viable outside the womb. Newborn care has got huge progress, so it is absolutely clear that human being can survive independently outside the womb. Twenty-five years ago, infants weighting less than three and one-half pounds rarely survived. The current survival rate is 70 percent, and doctors are “salvaging” some babies that weigh only one and one-half pounds. Tremendous progress has been made in treating birth deformities such as spina bifida. Just ten years ago, only 5 percent of infants with transposition of the great arteries --- the congenital heart defect most commonly found in newborns --- survived. Today, 50 percent live.15. Yet, for many infants who owe their lives to new medical advances, survival has come at a price. A significant number emerge with permanent physical and mental handicaps.16. “The question of treatment and nontreatment of seriously ill newborns is not a single one,”says Thomas Murray of the Hastings Center. “But I feel strongly that retardation or the fact that someone is going to be less than perfect is not good grounds for allowing an infant to die.”17. For many parents, however, the experience of having a sick newborn becomes a lingering nightmare. Two years ago, an Atlanta mother gave birth to a baby suffering from Down’s Syndrome, a form of mental retardation; the child also had blocked intestines. The doctors rejected the parents’ plea not to operate, and today the child, severely retarded, still suffers intestinal problems.18. “Every time Melanie has a bowel movement, she cries,” explains her mother.“She’s not able to take care of herself, and we won’t live forever. I wanted to save her from sorrow, pain, and suffering. I don’t understand the emphasis on life at all costs, and I’m very angry at the doctors and the hospital. Who will take care of Melanie after we’re gone? Where will you doctors be then?”Changing Standards19. The choices posed by modern technology have profoundly changed the practice of medicine. Until now, most doctors have been activists, trained to use all the tools in their medical arsenals to treat disease. The current trend is toward nontreatment as doctors grapple with questions not just of who should get care but when to take therapy away.20. Always in the background is the threat of legal action. In August, two California doctors were charged with murdering a comatose patient by allegedly disconnecting the respirator and cutting off food and water. In 1981, a Massachusetts nurse was charged with murdering a cancer patient with massive doses of morphine but was subsequently acquitted.21. Between lawsuits, government regulations, and patients’ rights, many doctors feel they are under siege. Modern technology actually has limited their ability to make choices. More recently, these actions are resolved by committees.Public Policy22. In recent years, the debate on medical ethics has moved to the level of national policy. “It’s just beginning to hit us that we don’t have unlimited resources,” says Washington Hospital Center’s Dr. Lynch. “You can’t talk about ethics without talkingethics without talking about money.”23. Since 1972. Americans have enjoyed unlimited access to a taxpayer-supported, kidney dialysis program that offers life-prolonging therapy to all patients with kidney failure. To a number of police analysts, the program has grown out of control --- to a $1.4billion operation supporting 61,000 patients. The majority are over 50, and about a quarter have other illness, such as cancer or heart disease, conditions that could exclude them from dialysis in other countries.24. Some hospitals are pulling back from certain lifesaving treatment. Massachusetts General Hospital, for example, has decided not perform heart transplants on the ground that the high costs of providing such surgery help too few patients. Burn units --- through extremely effective --- also provide very expensive therapy for very few patients.25. As medical scientists push back the frontiers of therapy, the moral dilemma will continue to grow for doctors and patients alike, making the choice of to treat the basic question in modern medicine.1. 在特效药、风险性手术进程、放疗法以及特护病房方面的医学进展已为数千人带来新生。

骨头的英语介绍作文

骨头的英语介绍作文Title: A Comprehensive Introduction to Bones。

Bones are integral components of the human body, serving as the framework that supports our structure and facilitates movement. Composed primarily of calcium phosphate and collagen, bones exhibit remarkable strength and resilience. In this discourse, we delve into the intricate world of bones, exploring their structure, functions, and significance in human physiology.Structure of Bones:At a macroscopic level, bones are classified into four main types: long, short, flat, and irregular. Long bones, such as the femur and humerus, are characterized by their elongated shape and serve as levers for movement. Short bones, like those found in the wrists and ankles, provide support and stability. Flat bones, such as the skull and sternum, offer protection to vital organs, while irregularbones, like the vertebrae, have complex shapes and fulfill specialized functions.Microscopically, bones consist of a dense outer layer called compact bone and a porous inner network known as cancellous or spongy bone. Compact bone provides strength and durability, while spongy bone facilitates nutrient exchange and houses bone marrow, where blood cells are produced.Functions of Bones:Bones perform various crucial functions essential for human survival and well-being:1. Support: Bones form the structural framework of the body, providing support and maintaining posture.2. Protection: Bones safeguard delicate organs such as the brain, heart, and lungs from injury and trauma.3. Movement: Skeletal muscles, attached to bones viatendons, enable movement by exerting force on the skeletal system.4. Mineral Storage: Bones store minerals like calcium and phosphorus, which are vital for numerous physiological processes, including muscle contraction and nerve function.5. Blood Cell Formation: Within the bone marrow, hematopoietic stem cells produce red blood cells, white blood cells, and platelets through a process called hematopoiesis.6. Fat Storage: Yellow bone marrow, found in the shafts of long bones, serves as a site for fat storage and energy reserves.Significance in Human Physiology:The importance of bones in maintaining overall health cannot be overstated. Apart from their mechanical functions, bones play a crucial role in metabolic processes, hormonal regulation, and immune function. For instance, boneremodeling, the continuous process of bone resorption and formation, ensures the structural integrity of bones and regulates calcium levels in the bloodstream. Additionally, bones produce osteocalcin, a hormone that influences glucose metabolism and insulin sensitivity, thereby impacting overall metabolic health.Furthermore, bones interact with other systems in the body, such as the endocrine and immune systems. For instance, the hormone calcitonin, secreted by the thyroid gland, regulates calcium levels in the blood by promoting calcium deposition in bones. Moreover, bone marrow hosts immune cells like lymphocytes and macrophages, contributing to the body's defense against infections and diseases.Clinical Implications:Disorders affecting the skeletal system, such as osteoporosis, osteoarthritis, and fractures, can have profound consequences on an individual's health and quality of life. Osteoporosis, characterized by low bone density and increased susceptibility to fractures, is particularlyprevalent among the elderly population, leading to increased morbidity and mortality. Similarly, osteoarthritis, a degenerative joint disease, results in pain, stiffness, and impaired mobility, significantly impacting daily activities.Understanding the structure and function of bones is essential for healthcare professionals in diagnosing and managing skeletal disorders effectively. Diagnostic modalities such as X-rays, bone density scans, and magnetic resonance imaging (MRI) play a crucial role in assessing bone health and detecting abnormalities. Treatment strategies may include pharmacological interventions, lifestyle modifications, and surgical procedures aimed at restoring skeletal integrity and alleviating symptoms.In conclusion, bones serve as the architectural backbone of the human body, providing support, protection, and mobility while actively participating in metabolic and regulatory processes. Their intricate structure and multifaceted functions underscore their significance in human physiology and health. Through ongoing research andadvancements in medical science, we continue to unravel the complexities of bones, paving the way for improved diagnosis, treatment, and prevention of skeletal disorders.。

关于水的英语作文

Water is an essential element for life on Earth.It is a vital component of our bodies, making up about60%of our body weight.It is crucial for various bodily functions, including digestion,circulation,and temperature regulation.Here are some key points to consider when writing an essay about water:1.Importance of Water in Life:Begin by discussing the fundamental role water plays in sustaining life.It is not only necessary for human survival but also for the existence of all living organisms.2.Sources of Water:Discuss the various sources of water,such as rivers,lakes,oceans, and underground aquifers.Explain how these sources are interconnected and form the hydrological cycle.3.Water in the Environment:Describe the role of water in the environment,including its importance in ecosystems,the role it plays in climate regulation,and its contribution to the water cycle.4.Human Use of Water:Explore the different ways humans use water,such as for drinking,agriculture,industry,and recreation.Discuss the importance of water conservation and the challenges of meeting the growing demand for water resources.5.Water Pollution:Address the issue of water pollution,which is a significant threat to the availability of clean water.Discuss the causes of water pollution,such as industrial waste,agricultural runoff,and improper waste disposal.6.Water Treatment and Purification:Explain the processes used to treat and purify water to make it safe for human consumption.Discuss the importance of these processes in preventing waterborne diseases.7.Water Scarcity and Conservation:Discuss the issue of water scarcity in different parts of the world and the measures being taken to conserve water.Highlight the role of technology in improving water efficiency and the importance of public awareness in promoting water conservation.8.Future Challenges and Solutions:Conclude by looking at the future challenges related to water availability and management.Discuss potential solutions,such as rainwater harvesting,desalination,and the development of new technologies to improve water use efficiency.9.Cultural Significance:You might also want to touch on the cultural significance ofwater in various societies,how it is revered in religious contexts,and its symbolic representation in art and literature.10.Personal Reflection:End your essay with a personal reflection on the importance of water in your life and what you can do to contribute to its conservation.Remember to structure your essay with a clear introduction,body paragraphs that explore each point in detail,and a conclusion that summarizes your main ideas and leaves a lasting impression on the e descriptive language and relevant examples to make your essay engaging and informative.。

人类无法想象没有水的生活英语作文

人类无法想象没有水的生活英语作文Humans cannot imagine life without water. Water is essential for the survival of all living organisms, including humans. It is a vital element for all life on Earth, and without it, our existence would be impossible.Water is crucial for a variety of bodily functions. It helps regulate body temperature, carries nutrients and oxygen to cells, removes waste, and lubricates joints. Without water, our bodies would not be able to function properly, and we would soon perish.In addition to its importance for our bodies, water is also essential for agriculture and food production. Without water, crops would not grow, and livestock would not have enough to drink. This would lead to widespread famine and starvation, as food supplies would dwindle and become scarce.Water is also essential for sanitation and hygiene. Without clean water, diseases would spread rapidly, leading to widespread illness and death. Access to clean water is crucial for maintaining public health and preventing the spread of infectious diseases.Furthermore, water plays a vital role in the environment. It is essential for the survival of plants and animals, and without it, ecosystems would collapse. Water is also important for maintaining biodiversity and supporting a healthy planet.In addition to its biological importance, water is also crucial for human society and civilization. It is used for industrial processes, energy production, transportation, and recreation. Without water, many aspects of human life would be impossible, and society as we know it would cease to exist.In conclusion, water is essential for all aspects of life on Earth. Without it, humans would not be able to survive, and the planet would be uninhabitable. We must take care of our water resources and ensure that future generations have access to clean and safe water. Our lives depend on it.。

waterisimportant英语作文

waterisimportant英语作文Water is one of the most essential resources for life on Earth. It is crucial for the survival of all living organisms, including humans, animals, and plants. Without water, life as we know it would be impossible. Water plays a vital role in maintaining the balance of ecosystems, providing habitat for various species, and sustaining agricultural production. In this essay, we will explore the importance of water and its significance in our daily lives.First and foremost, water is essential for human survival. Our bodies are composed of approximately 60% water, and we need to consume it regularly to maintain proper bodily functions. Water is crucial for digestion, circulation, temperature regulation, and the elimination of waste products. Without an adequate supply of water, our bodies would not be able to function properly, leading to dehydration and potentially life-threatening health issues.In addition to its importance for human health, water is also essential for agriculture and food production. Water is used for irrigation to grow crops, water livestock, and maintain farm operations. Without sufficient water, farmers would not be able to produce enough food to feed the growing global population. Water is also used in food processing, packaging, andtransportation, making it a critical component of the food supply chain.Furthermore, water is essential for maintaining ecosystems and biodiversity. Wetlands, rivers, lakes, and oceans are home to a diverse array of plants and animals that rely on water for their survival. Water provides habitat, food, and breeding grounds for millions of species, and plays a crucial role in the functioning of ecosystems. Without water, many species would face extinction, leading to a loss of biodiversity and disrupting the delicate balance of nature.Moreover, water is essential for energy production and industrial processes. Water is used in hydropower generation, cooling systems for power plants, and manufacturing processes in various industries. Without water, these essential activities would not be possible, leading to energy shortages and economic disruptions. Water is also used in cleaning, sanitation, and waste treatment processes, contributing to public health and environmental protection.In conclusion, water is a precious resource that is essential for life on Earth. It is crucial for human health, food production, ecosystem maintenance, energy production, and industrial processes. It is our collective responsibility to conserve andprotect water resources for future generations. By using water wisely, reducing waste, and investing in sustainable water management practices, we can ensure a secure and healthy water supply for all living organisms. Water is indeed important, and we must strive to protect it for the benefit of present and future generations.。

人类身体的作用英语作文

人类身体的作用英语作文{z}The human body is a complex and intricate system, designed to perform a wide range of functions that are essential for survival and well-being.Each part of the body, from the smallest cell to the largest organ, plays a crucial role in maintaining overall health and functionality.The brain, for example, is the control center of the body, responsible for processing information from the senses, coordinating movements, and regulating emotions.The heart pumps blood throughout the body, delivering oxygen and nutrients to cells and removing waste products.The lungs allow us to breathe, taking in oxygen and expelling carbon dioxide.The skeletal system provides support and structure for the body, protecting internal organs and allowing for movement.The muscular system enables us to move and perform tasks, while the digestive system processes food and extracts nutrients.The reproductive system ensures the continuation of the species, and the urinary system helps to maintain fluid balance and remove toxins from the body.In addition to these physical functions, the human body also plays a role in maintaining emotional and mental health.The endocrine system produces hormones that regulate mood, growth, and reproduction, while the immune system defends the body against disease and infection.Overall, the human body is a remarkable creation, capable ofperforming countless tasks and functions that are essential for life.By understanding how each part of the body works and how they all interact with one another, we can gain a greater appreciation for the complexity and beauty of the human body.。

人们对水的要求的英语作文

人们对水的要求的英语作文Title: The Essence of Water: Meeting Humanity's Needs。

Water, the elixir of life, holds a paramount position in fulfilling the diverse needs of humanity. From quenching thirst to sustaining agriculture and supporting industrial activities, the significance of water permeates every facet of human existence. In this essay, we delve into the multifaceted demands for water and the imperative to manage this invaluable resource sustainably.First and foremost, the fundamental requirement for water lies in its role as a vital component for human survival. The human body, composed of approximately 60% water, necessitates regular intake to maintainphysiological functions. Access to clean drinking water is, therefore, a basic human right and a cornerstone of public health. Ensuring universal access to potable water is not merely a matter of convenience but a moral imperative that underpins human dignity and well-being.Beyond personal consumption, water plays an indispensable role in agriculture, the backbone of food production. Agriculture accounts for the lion's share of global water usage, with irrigation systems harnessing water resources to cultivate crops and sustain livestock. As the global population burgeons, the demand for food surges in tandem, placing greater strain on water supplies. Thus, efficient water management practices, such as drip irrigation and precision agriculture, are pivotal in maximizing agricultural productivity while minimizing water wastage.Moreover, water serves as a cornerstone of industrial processes, spanning manufacturing, energy production, and resource extraction. Industries rely on water for cooling, processing, and transportation, making it an indispensable resource for economic development. However, industrial activities also pose significant challenges to waterquality through pollution and contamination. Striking a balance between industrial growth and environmental sustainability necessitates robust regulatory frameworksand technological innovations to mitigate water pollution and preserve aquatic ecosystems.Furthermore, water plays a pivotal role in sustaining ecosystems and biodiversity. Wetlands, rivers, and oceans harbor a plethora of life forms, from microscopic organisms to charismatic megafauna. These ecosystems provideessential services such as water purification, flood regulation, and habitat provision, underpinning the resilience of natural systems. However, anthropogenic activities, including habitat destruction and climate change, pose grave threats to aquatic ecosystems, jeopardizing their ability to provide these invaluable services.In addition to meeting current needs, water management must also account for future challenges posed by climate change and population growth. Climate variability manifests in erratic rainfall patterns, prolonged droughts, and more frequent extreme weather events, exacerbating waterscarcity in vulnerable regions. Population growth further strains water resources, amplifying competition for limitedsupplies. Adapting to these challenges requires a multifaceted approach encompassing conservation, innovation, and equitable distribution of water resources.In conclusion, the demand for water is multifaceted, encompassing basic human needs, agricultural production, industrial processes, and ecosystem sustainability. Meeting these diverse needs necessitates a concerted effort to manage water resources judiciously, balancing competing interests while safeguarding the integrity of ecosystems.By embracing sustainable water management practices, we can ensure equitable access to this precious resource for present and future generations.。

干净水的重要性作文英语

干净水的重要性作文英语English:Clean water is essential for human survival and overall health. It plays a crucial role in various bodily functions such as digestion, circulation, and temperature regulation. Additionally, clean water is necessary for personal hygiene, sanitation, and preventing the spread of diseases. Access to clean water is a basic human right, yet millions of people around the world still lack access to safe drinking water. Contaminated water sources can lead to waterborne illnesses such as cholera, typhoid, and dysentery, causing widespread suffering and even death. Furthermore, water pollution not only affects human health but also has detrimental effects on ecosystems and wildlife. It is crucial for governments, organizations, and individuals to work together to protect and conserve clean water sources for the well-being of current and future generations.中文翻译:干净的水对人类的生存和整体健康至关重要。

身体作用英文作文

身体作用英文作文英文：As a human being, our body is a complex machine that performs a variety of functions. These functions are essential for our survival and well-being. In this essay, I will discuss some of the important functions of the human body.Firstly, the human body has a digestive system that breaks down food into nutrients that our body needs. The nutrients are then absorbed into the bloodstream and transported to different parts of the body. Without this function, we would not be able to get the energy we need to carry out our daily activities.Secondly, the human body has a respiratory system that allows us to breathe in oxygen and breathe out carbon dioxide. This process is essential for the survival of our cells and tissues. Without oxygen, our cells would not beable to produce energy, and we would die within a few minutes.Thirdly, the human body has a circulatory system that transports blood throughout the body. The blood carries oxygen and nutrients to the cells and tissues and removes waste products. Without this function, our cells would not be able to get the nutrients they need, and waste products would accumulate, causing damage to our body.In addition to these functions, the human body also has a nervous system that allows us to sense and respond to our environment. It enables us to move our body and communicate with others. Without this function, we would not be able to interact with the world around us.Overall, the human body is an amazing machine that performs a wide range of functions. These functions are essential for our survival and well-being. As we go about our daily lives, it is important to take care of our body by eating healthy, exercising regularly, and getting enough rest.中文：作为一个人类，我们的身体是一个复杂的机器，执行着各种功能。

为什么人类可以在地球上生存英语作文

为什么人类可以在地球上生存英语作文全文共3篇示例，供读者参考篇1Why Can Human Beings Survive on Earth?Earth is the only known planet in the universe that can sustain life. It has all the necessary conditions to support various forms of life, including human beings. There are several reasons why human beings can survive on Earth.Firstly, Earth has a suitable atmosphere for human beings to breathe. The atmosphere consists mainly of nitrogen and oxygen, which are essential for human respiration. The oxygen allows us to breathe and stay alive, while the nitrogen helps regulate our bodily functions. The atmosphere also protects us from harmful radiation from the sun and outer space.Secondly, Earth has a moderate temperature range that is ideal for human survival. The average temperature on Earth is around 15 degrees Celsius, which is neither too hot nor too cold for us to live comfortably. This temperature range allows for the existence of liquid water, which is crucial for our survival. Water isessential for drinking, bathing, cooking, and agriculture, among other things.Thirdly, Earth has a diverse range of ecosystems that provide us with food, shelter, and resources. The planet's rich biodiversity includes plants, animals, and microorganisms that we rely on for our survival. We can obtain food from plants and animals, build shelter from natural materials, and use resources like wood, water, and minerals for various purposes.Additionally, Earth's gravity is ideal for human beings to live and thrive. The planet's gravitational pull keeps us grounded and allows us to walk, run, and perform various activities. It also helps maintain the stability of our atmosphere and climate, preventing them from drifting off into space.Furthermore, Earth has a stable orbit around the sun, which provides us with a consistent source of heat and light. The planet's rotation on its axis creates day and night cycles, allowing us to rest and work in a regular pattern. The tilt of Earth's axis also gives us seasons, which help regulate the climate and weather conditions.In conclusion, human beings can survive on Earth because of its suitable atmosphere, moderate temperature range, diverse ecosystems, ideal gravity, stable orbit, and other factors. Theseconditions provide us with the necessary resources and environment to live, thrive, and evolve as a species. We must cherish and protect our planet to ensure that future generations can continue to enjoy the benefits of living on Earth.篇2Why can humans survive on Earth?Humans have been able to survive on Earth for thousands of years due to a combination of factors that make this planet uniquely suitable for sustaining life. From the composition of the atmosphere to the abundance of water and the presence of a variety of ecosystems, Earth provides the necessary conditions for humans to thrive.One of the key reasons why humans can survive on Earth is the composition of the atmosphere. The Earth's atmosphere is made up of approximately 78% nitrogen, 21% oxygen, and small amounts of other gases like carbon dioxide and water vapor. This composition is ideal for human respiration, as we rely on oxygen to breathe and remove carbon dioxide from our bodies. The atmosphere also helps regulate temperature on Earth, trapping heat from the sun to maintain comfortable temperatures for humans to live in.Another crucial factor that allows humans to survive on Earth is the presence of liquid water. Water is essential for all forms of life, and Earth is unique in its abundance of this vital resource. The presence of oceans, rivers, lakes, and aquifers means that humans have access to the water they need for drinking, washing, and irrigating crops. Without water, humans would not be able to survive on Earth.The diversity of ecosystems on Earth also plays a significant role in allowing humans to survive. From lush forests to barren deserts, Earth's ecosystems provide a variety of habitats and resources that humans can use to meet their needs. These ecosystems also help regulate the climate, purify the air, and provide food and other materials that humans rely on for survival.Additionally, Earth's position in the solar system is key to human survival. The Earth is located at just the right distance from the sun to receive the amount of heat and light needed for life to flourish. If the Earth were too close or too far from the sun, temperatures would be too extreme for humans to survive. The Earth's tilt on its axis also creates the seasons, which help regulate plant growth and agricultural cycles that humans depend on for food.In conclusion, humans can survive on Earth due to a combination of factors that make this planet uniquely hospitable to life. From the composition of the atmosphere to the abundance of water and the presence of diverse ecosystems, Earth provides the necessary conditions for humans to thrive. By understanding and appreciating these factors, humans can continue to live in harmony with the planet that sustains us.篇3Why Can Humans Survive on Earth?The Earth is a unique planet in our solar system, offering a perfect combination of conditions that allow human beings to thrive and survive. In this essay, we will explore the reasons why humans can survive on Earth.One of the main factors that allow humans to survive on Earth is its distance from the sun. The Earth is located at a perfect distance from the sun, which means that it receives just the right amount of heat and light to support life. If the Earth were closer to the sun, it would be too hot for humans to survive, and if it were further away, it would be too cold. The Earth's distance from the sun allows for the perfect temperature range for humans to live comfortably.Another important factor in human survival on Earth is the presence of water. Water is essential for all forms of life, and the Earth has an abundance of it. The oceans, rivers, and lakes on Earth provide humans with the water they need to drink, irrigate crops, and sustain themselves. Without water, humans would not be able to survive for long periods of time.The Earth's atmosphere is also crucial for human survival. The Earth's atmosphere is made up of a mixture of gases, including oxygen, nitrogen, and carbon dioxide. The levels of these gases are just right to support human life. Oxygen is essential for humans to breathe, while nitrogen and carbon dioxide are also important for maintaining the balance of gases in the atmosphere. The Earth's atmosphere protects humans from harmful radiation from the sun and provides the air we need to survive.The Earth's gravity is another important factor in human survival. The Earth's gravity is strong enough to hold humans down and keep them from floating off into space. Gravity also provides a stable environment for humans to live in, allowing them to build structures, grow crops, and move around freely. Without gravity, humans would not be able to survive on Earth.The Earth's magnetic field is also crucial for human survival. The Earth's magnetic field protects humans from harmful radiation from the sun and cosmic rays. The magnetic field also helps to maintain the Earth's atmosphere and protect it from being stripped away by solar winds. Without the Earth's magnetic field, humans would be exposed to dangerous levels of radiation, making survival much more difficult.In conclusion, humans can survive on Earth due to a combination of factors, including the Earth's distance from the sun, the presence of water, the composition of the atmosphere, gravity, and the magnetic field. These factors work together to create a perfect environment for human life. As long as humans continue to take care of the Earth and preserve its natural resources, they will be able to thrive and survive on this unique planet for generations to come.。

情感的功能英语作文

情感的功能英语作文Emotions are a complex and integral part of the human experience, serving a multitude of functions that are essential for our survival, social interactions, and overall well-being. In this essay, we will explore the various roles that emotions play in our lives.1. Communication: Emotions are a powerful means of non-verbal communication. They convey our internal states to others, allowing for a deeper level of understanding and connection.A smile can express happiness, while a frown can signal disapproval or sadness, often without the need for words.2. Decision-Making: Emotions influence our decision-making processes. They can act as a guide, helping us to choose between different options. For instance, fear can deter us from dangerous situations, while joy can encourage us to pursue activities that bring satisfaction.3. Motivation: Emotions can serve as a strong motivator. Love can inspire us to work hard for our family's well-being, while anger can drive us to address injustices or to strive for personal improvement.4. Social Bonding: Sharing emotions can foster social bonds. Empathy, for example, allows us to understand and share the feelings of others, which is crucial for building trust and maintaining relationships.5. Health and Healing: Emotions are closely linked to our physical health. Chronic stress and negative emotions canlead to various health issues, while positive emotions and effective emotional expression can contribute to a stronger immune system and faster recovery from illness.6. Learning and Memory: Emotions can enhance our ability to learn and remember information. Emotional experiences tend to be more vivid and are often better recalled than neutral ones. This is why stories that evoke emotions are more memorable.7. Coping Mechanism: Emotions can act as a coping mechanism, helping us to deal with challenging situations. They can provide a temporary escape, offer comfort, or even give usthe strength to overcome adversity.8. Personal Identity: Our emotional experiences are part ofour personal identity. They shape our character and definewho we are. The way we feel and express our emotions can saya lot about our personality and values.9. Creativity: Emotions can fuel creativity. Artists, writers, and musicians often draw from their emotional experiences to create works that resonate with others on an emotional level.10. Moral and Ethical Judgment: Emotions play a role in our moral and ethical decision-making. Empathy, compassion, and guilt are emotions that can guide us towards ethical behavior and societal norms.In conclusion, emotions are multifaceted and serve a wide array of functions that are vital to our existence. They are not merely reactions to stimuli but are active participants in shaping our lives and the world around us. Understanding the functions of emotions can lead to better emotional intelligence and improved interpersonal skills, which are essential for navigating the complexities of human society.。

函数的发展史作文600字

函数的发展史作文600字英文回答：The development of functions can be traced back to ancient times when humans first started to organize and categorize their daily activities. In primitive societies, people relied on basic functions such as hunting, gathering, and building shelters to survive. These functions were essential for their survival and were passed down from generation to generation.As societies evolved and became more complex, the need for more specialized functions arose. For example, the function of agriculture emerged as people started to cultivate crops and domesticate animals. This function allowed them to produce food in a more efficient and sustainable manner, leading to the growth of civilizations.With the advancement of technology and the rise of industrialization, functions became even more diverse andsophisticated. The function of manufacturing, for instance, enabled the mass production of goods, leading to the development of industries and the expansion of trade.In the modern era, functions have expanded beyond the physical realm and into the digital world. The function of information technology has revolutionized the way we communicate, access information, and conduct business. Functions such as online shopping, social media, and cloud computing have become an integral part of our daily lives.In conclusion, the development of functions has been a continuous process throughout history. From basic survival functions to complex technological functions, they have shaped the way we live and interact with the world. Functions are essential for the functioning of societies and are constantly evolving to meet the changing needs of humanity.中文回答：函数的发展可以追溯到古代，当人类开始组织和分类他们的日常活动时。

有关水的英语作文

有关水的英语作文Water is an essential element for all living beings on Earth. It covers about 70% of the Earth's surface and is vital for the survival of all living organisms. Water is not only important for drinking and irrigation, but it also plays a crucial role in various other aspects of life.First and foremost, water is essential for human survival. The human body is made up of about 60% water, and it is necessary for carrying out various bodily functions such as digestion, absorption, circulation, and excretion. It also helps to regulate body temperature and maintain electrolyte balance. Without an adequate supply of water, the human body cannot function properly, and dehydration can lead to severe health problems and even death.In addition to human survival, water is also crucialfor agriculture. It is used for irrigation to grow crops and feed livestock, which is essential for food production. Without water, agriculture would not be possible, and therewould be a shortage of food, leading to widespread hunger and malnutrition.Furthermore, water plays a vital role in the environment. It is essential for the survival of various ecosystems, including rivers, lakes, and oceans. Water provides a habitat for countless species of plants and animals, and it is necessary for their survival. It also helps to regulate the Earth's climate and weather patterns, and it plays a crucial role in the water cycle.Moreover, water is essential for various industrial processes. It is used in manufacturing, mining, and energy production, among other industries. Water is also used for transportation and as a source of recreation and tourism. Without water, these industries would not be able to function, and the economy would suffer as a result.Despite the importance of water, it is a finite resource, and it is facing numerous challenges. The world's population is growing, and the demand for water is increasing. Climate change is leading to more frequent andsevere droughts, and pollution is contaminating many water sources. These factors are putting a strain on the world's water supply, and if they are not addressed, there could be severe consequences.In conclusion, water is an essential element for all living beings on Earth. It is necessary for human survival, agriculture, the environment, and various industries. However, it is facing numerous challenges, and it is important to conserve and protect this vital resource. By taking steps to address issues such as overuse, pollution, and climate change, we can ensure that water remains available for future generations. It is our responsibility to take care of this precious resource and ensure that itis available for all living beings on Earth.。

生理功能的英语

生理功能的英语Physiological functions are the natural processes that keep our bodies working. They are essential for our survival and include activities such as breathing, digesting food, and repairing damaged tissues.From a young age, we learn about the importance of these bodily processes. They are fundamental to our understanding of health and well-being. For instance, the circulatory system is responsible for transporting oxygen and nutrients throughout the body, while the respiratory system manages the exchange of gases.As we grow older, our understanding of these functions deepens. We begin to recognize the complexity of the immune system, which defends against pathogens, or the endocrine system, which regulates hormones and maintains homeostasis.In the realm of sports and fitness, the focus oftenshifts to the muscular and skeletal systems, which work in tandem to facilitate movement and support our body structure. Athletes, in particular, must have a keen awareness of these systems to optimize performance and prevent injuries.Moreover, the study of physiology can also extend to the nervous system, which is crucial for communication within the body and between the body and the external environment. It's fascinating to explore how the brain processes informationand coordinates our actions.Finally, as we age, the conversation about physiological functions may turn to maintaining them. It's important to understand how lifestyle choices, such as diet and exercise, can influence the health of our physiological systems and contribute to a longer, more vibrant life.。

关于水的用处英语作文

关于水的用处英语作文Water is one of the most essential resources on Earth, and its importance cannot be overstated. From sustaining life to supporting various activities, water plays a crucial role in our daily lives. First and foremost, water is vital for human survival. Our bodies are made up of approximately 60% water, and we require it for various bodily functions, such as digestion, circulation, and temperature regulation. Without an adequate supply of water, we would not be able to survive. Furthermore, water is essential for agriculture and food production. Farmers rely on water to irrigate crops, sustain livestock, and ensure a successful harvest. Without water, agriculturewould be impossible, leading to food shortages and hunger.In addition, water is crucial for maintaining cleanliness and hygiene. We use water for bathing, washing clothes, and keeping our surroundings clean. Proper sanitation practices, which rely on water, are essential for preventing the spread of diseases and promoting public health. Moreover, water is used in various industries, including manufacturing, energy production, and transportation. It is a key component in processes such as cooling, cleaning, and production. Without water, many industries would not be able to function efficiently.In conclusion, water is a precious resource that is indispensable to our lives and the functioningof our society. It is essential for human survival, agriculture, hygiene, industry, and countlessother activities. As such, we must cherish and conserve water to ensure its availability for future generations.。

新标准大学英语(第二版)综合教程-精读2-课后参考翻译

新标准大学英语综合教程2课后参考翻译第一单元课后翻译：现在中国大学生参加志愿活动已成为常态。

他们到社区为老年人服务，到山区助学，举办爱心捐赠活动,或到世博会（World Expo）或奥运会等重要国际活动担任志愿者.参加志愿活动有助于学生获取专业技能,丰富社会经验，提高道德水平。

多数大学生都认为参与志愿服务是自己应尽的社会责任和义务，希望能做一些有意义的事情来回报社会，积极推动社会和谐发展。

Volunteering has now become the norm for college students in China. The volunteers may provide community services for senior citizens，support students in mountain areas in education, organize fundraising activities to help those in need，or work for major international projects such as the World Expo and the Olympic Games。

Doing volunteer work is a useful way for students to enhance their professional skills and social experience as well as promoting their moral development. The majority of college students believe that it is their duty and obligation to participate in volunteer activities. They hope that they can do something meaningful and promote the development of social harmony.第二单元课后翻译：“不以物喜，不以己悲"出自北宋文学家范仲淹的名著《岳阳楼记》,意思是凡事都要以一颗平常心看待，不因外部事物的好坏和自己的得失而或喜或悲。

水的英文英语作文

水的英文英语作文Water is one of the most essential substances for life on Earth. Its significance transcends mere hydration; it plays a pivotal role in various aspects of human existence, ecosystem sustainability, and industrial development.First and foremost, water is indispensable for human survival. From quenching thirst to facilitating bodily functions, its consumption is non-negotiable. Moreover, water serves as a medium for transportation within the body, aiding in the distribution of nutrients and removal ofwaste products. Additionally, its therapeutic propertiesare widely acknowledged, with hydrotherapy being aprevalent form of treatment for various ailments.Beyond human needs, water is a cornerstone of ecosystem health. Aquatic habitats support diverse flora and fauna, contributing to biodiversity and ecological balance. Rivers, lakes, and oceans host myriad species, forming intricate food webs and sustaining life cycles. Moreover, wetlandsact as natural filters, purifying water and mitigating the impact of pollutants.Furthermore, water plays a crucial role in agriculture, the backbone of human civilization. Irrigation systems harness its abundance to nourish crops, ensuring food security and agricultural productivity. Additionally,water-intensive industries such as textile manufacturingand food processing rely heavily on its availability for production processes.In the realm of energy production, water serves as avital resource. Hydroelectric power generation harnessesthe kinetic energy of flowing water to produce electricity, offering a renewable and clean energy alternative. Moreover, water plays a pivotal role in cooling systems for thermal power plants, ensuring optimal operational efficiency.However, despite its abundant presence on Earth, access to clean and safe water remains a pressing global challenge. Many regions grapple with water scarcity, exacerbated by factors such as climate change, population growth, andinadequate infrastructure. Furthermore, water pollution poses significant threats to human health and environmental sustainability, necessitating concerted efforts towards conservation and stewardship.In conclusion, water is undeniably the essence of life, sustaining ecosystems, powering industries, and fulfilling human needs. Its conservation and equitable distribution are imperative for ensuring a sustainable future for generations to come. As stewards of this precious resource, it is incumbent upon us to adopt responsible practices and policies to safeguard water security and promote its equitable access for all.。

综合四—英语作文和翻译

▆ Answers for Reference:1)The village is so close to the border that the villagers lived in constant fear of attacks from the enemy.这个村子离边境很近，村民们一直担心会受到敌人的攻击。

2) In only twenty years the country was transformed into an advanced industrial power.这个国家仅用了20年的时间就发展成了一个先进的工业强国3) Seeing the project successfully completed, those who had invested so much time and energy in it felt very proud.看到项目顺利完成，那些为此投入了大量时间和精力的人们都感到非常自豪。

4) Given the current financial situation, it is inevitable that the US dollar will be further devalued.鉴于目前的金融形势，美元进一步贬值是不可避免的。

5) There are so many vehicles nowadays that the roads in this area are barely adequate to cope with the present traffic.现在的汽车太多了，这个地区的道路几乎无法应对当前的交通状况。

6) The weather showed no signs of getting better so the government called upon us to get prepared for floods.天气没有出现好转的迹象，所以政府号召我们做好防洪的准备。