the sun rises in the east and sets in the west, which is caused by the rotation of the earth as you all know. but have you ever thought of the effect of the earths rotation on man and can you imagine what would happen if the earth stopped rotating?
the radius of the earth is about 6,370 kilometres. it takes the earth 24 hours to rotate once. objects on the earths equator move with the earth at a speed of 460 metres per second, and the air close to the earths surface turns at the same speed. if the earth stopped rotating suddenly, the air would keep flowing eastward at a speed of 460 metres per second. the wind would be fourteen times as powerful as a hurricane. at the same time sea water would rush eastward at a speed of several hundred metres per second, which might do damages much greater than a seaquake would do. obviously, men could hardly stand such a catastrophe.
even if such a catastrophe would not happen, there would be a great temperature difference on the two hemispheres of the earth, and the four seasons of the year would no longer occur because a day and a night would be as long as a whole year instead of 24 hours. all this would greatly affect the life of human beings, imals and plants and that would cause worse results than anything imaginable.
I earnestly hope to lead a healthy and prosperous life in the future. Judging from my aptitude inclination and personality streaks, my ideal life will be that of a scientist, researching, lecturing, and writing books. As I am from a farming family, I particularly enjoy being close to earth. If I can afford to live a pastoral life in the countryside, I will feel most blessed.
As far as social life is concerned, simplicity is what I intend to pursue, so I really don't need too many friends. All these will be mere talk if I am idle now. To attain my goal, I must make a point of training my body and mind. This is a highly competitive society in which everyone is eager to come out on top. That is not only a competition of physical strength and mental power, but a marathon of patience, faith, and perseverance.
Life is not all roses, but with what I am being equipped with by the top teachers in this elite school, I surely deserve a promising prospect.
Dear mary:
How are you doing these days? I write this letter for expressing our appreciation of your great entertainment .
We have a very nice treavel in London,and have a wonderful impression on the senery there.London is a very beautiful city .
Not only the views but also the delicious food excited us.Facing this charming city and its abundant culture,we deeply felt its really a huge honor.
Would you like to accept our invitation for travelling in China?We sincerely Wish you a pleasure journey here.
Expresses our thanks once more .Have a nice day !
Yours,
Lihua
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