地理科学专业英语

Professional English of Geography
Name: Zhang Bo NO.: 08113055
My name is Zhang Bo, and my English name is Bob Bryant. Bob comes form my Chinese name.Bryant is form my favorite sport star of NBA He is the NBA's top physical fitness, personal mastery of the skills and gorgeous. Mental quality is extremely tenacious, for a victory was taken for granted. Can address their weaknesses constantly reinforced, until today, the various techniques are perfect. Super owned enterprise, the desire to win is extremely strong. The long-Mi "Jordan successors", in both attack and defense, comprehensive ability as a dare and the history of the Hall of Fame players mentioned in the same breath. ,so he is my idol .I've finished my undergraduate education in Xiang Fan University, Majoring in Geography Science .
Recently, heavy rain continued to batter many parts of southern China, causing flooding and a host of other problems in at least three provinces. It's led to some casualties and widespread evacuations. In southwestern Guizhou Province, 8 people died in rain-triggered disasters, two by lightning strikes. Two students in Wuchuan County were among the dead, when they were swept away by flash floods. 24 counties have been hit by flooding, with 350,000 people affected.In Sichuan Province, the downpours that began on Thursday have killed eight and left 29 missing.
The National Meteorological Center urged local authorities to take emergency action, including suspending outdoor operations, cutting power supplies in potentially dangerous areas, and efforts to prevent torrential flooding and mudslides.
I am sorry to hear that, so I want to talk about it .
The forming of rain in a cloud depends upon temperature. The lower the temperature, the more the molecules of water vapor in the cloud cling together. Then they form droplets of water. Usually droplets form around dust or other particles in the air when the dew point is reached. If ice crystals are in the cloud, even more droplets may form.In clouds, condensation may be so rapid that millions of droplets of water are formed. As these droplets collect more molecules and therefore become heavier, their weight makes them fall to the earth. If the temperature of the air is above freezing the drops will fall as rain.When the air high above the earth is well below freezing, the moisture in the air does not form raindrops. Instead, it forms snow. Snowflakes take on many interesting shapes. They seem to be formed around a center. Snow is made up of millions of these
flakes, each a bit of water vapor that in freezing temperatures was changed into a flake of snow.
Snowflakes are really crystals; they are water molecules grouped in a hexagonal pattern. It is interesting to study snowflake crystals under a hand lens.Sometimes droplets of water start out as rain and change into another form on their way to the earth. The raindrops may start downward through a layer of warm air and then strike a mass of cold air, where each raindrop freezes. These frozen raindrops fall to the earth as sleet; skeet us frozen rain.Sometimes still another change may take place in drops of rain. During a thunderstorm, swift upward currents of air usually carry raindrops with them. As the air grows colder, these raindrops may form little balls of ice. In a mass of warm air, they may get a coating of moisture, which freezes as soon as they are tossed up again into a colder mass of air. Up and down they are carried, acquiring more and more layers of ice. This goes on until the balls of ice become heavy enough to fall to the earth as hailstones. If you cut a hailstone in two, you can see the layers of ice.
Some scientists think that hailstones are formed in a different way. A hailstone nucleus, a tiny droplet of water that is frozen, may form high in the atmosphere. As it falls through a cloud, it meets cold water droplets and snowflakes which stick to this nucleus. The hailstone may meet many of these droplets and snowflakes before it falls from the cloud to the earth. As the droplets of water stick to the hailstone, they add a clear layer of ice. As snowflakes stick to it, they form a cloudy layer. This theory explains why clear and cloudy layers are found inside the hailstone when it is cut open..。