新概念2+lesson21

Lesson21 Mad or not?[Text]Airplanes are slowly driving memad. I live near an airport andpassing planes can be heardnight and day. The airport wasbuilt years ago, but for somereason it could not be used then.Last year, however, it came into use. Over a hundred people must have been driven away from their homes by the noise. I am one of the few people left. Sometimes I think this house will be knocked down by a passing plane. I have been offered a large sum of money to go away, but I am determined to stay here. Everybody says I must be mad and they are probably right.Origin and historyThe legend of flight dates back to the days of pre-history, and many stories can prove it. Our ancestors are so intelligent that making the dream of flight came true, which is according to the shape of birds. TheWright brothers are veryfamous among the inventors,and they made their firstflight trial on December 17,1903. This successful flight isadmitted by the FAI (Federation Aeronautique Internationale), and its status is irreplaceable. By 1905, their flight was able to fully controllable and stable.Aircraft is the fastest and the most comfortable vehicle. It is appropriate to transport the small but precious goods in a long distance flight. There are many free services on the plane like meals, drinks, blankets and so on. Flight crew are very mannerly and responsible, you can enjoy your trip under the services. A commercial aircraft has first class, business class and economy class. You can choose one kind on the basis of the individual condition.With the development of aviation, air travel in recent years becomes more and more popular, and it facilitates the tourism. As a famous person said, a coin has two sides. In fact, aviation has some negative impacts to the environment and human health. Aircraft engines give off noise, greenhouse gas and particulates, which leads to the climate’s changing and global dimming. But modern aircraft are noteworthymore fuel efficient, producers are hammering at reduce the emission of CO2 and other greenhouse gas. They will use some high-efficiency and clean fuels to clear up the drawbacks. Thus, we can take advantage of this giant bird, which makes our life colorful.【Words and expressions】MadAdj. 狂怒的If you saythat someone is mad, youmean that they are veryangry.You're just mad at mebecause I don't want to go.因为我不想去，你就冲我发火。

Adj. 蠢疯的(表不满) You use mad to describe people or things that you think are very foolish.You'd be mad to work with him again.你要是再和他一起工作就是蠢疯了。

madnessn. 蠢疯It is political madness.这是政治蠢疯。

Adj. (人) 疯的Someonewho is mad has a mind thatdoes not work in a normalway, with the result thattheir behaviour is very strange.She was afraid of going mad.她担心变疯。

MadlyAdv. 疯狂地Down in the streets people were waving madly.下面大街上，人们在疯狂地挥手。

Reasonn. 原因The reason for something is a fact or situation which explains why it happens or what causes it to happen.There is a reason for every important thing that happens.发生的每一件重要事情都是有原因的。

n. 道理; 理由If you say thatyou have reason to believesomething or to have aparticular emotion, you meanthat you have evidence for yourbelief or there is a definite causeof your feeling.They had reason to believe there could be trouble.他们有理由相信会有麻烦。

n.理智The ability that people have to think and to make sensible judgments can be referred to as reason....a conflict between emotion and reason.…情感与理智的冲突。

Vt.推断If you reason that something is true, you decide that it is true after thinking carefully about all the facts.I reasoned that changing my diet would lower my cholesterol level.我推断改变我的饮食会降低我的胆固醇水平。

Sumn. (一) 笔(钱) A sum ofmoney is an amount of money.Large sums of money werelost.大笔大笔的钱损失了。

n. (数字的) 和he sum of twoor more numbers is the number that is obtained when they are added together.The sum of all the angles of a triangle is 180 degrees.一个三角形的所有角度之和是180度。

n. 全部The sum of something is all of it. You often use sum in this way to indicate that you are disappointed because the extent of something is rather small, or because it is not very good.To date, the sum of my gardening experience had been futile efforts to rid the flower beds of grass.迄今为止，我全部的园艺经验就是给花圃徒劳地除草。

sum up总结；概述；计算…的总数in sum总而言之；大体上determinedadj. 坚决的If you are determined to do something, you have made a firm decision to do it and will not let anything stop you.His enemies are determined to ruin him.他的敌人决意要毁了他。

DeterminedlyAdv. 坚决地She shook her head, determinedly.她坚决地摇摇头。