When I was in high school, one of my classmates sit right beside me. His name is ChenLiang. He is my unforgettable person in my life.
I remembered my mathematics was just mediocre at that time, but he was extraordinary and excellent in calculating and solving mathematic questions. He often received perfect scores. Of course, I wished I could reach at his level. Since we talked all day long, I asked how he could solve those difficult questions. He was so patient and polite to answer my sometimes ridiculous thinking. Gradually, I built my confidence at mathematics and finally passed the college entrance exam.
Now, we are apart, but I still remember his great attitude and willing in study. I am so obliged to my classmate, who is my friend always and forever.
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.
One day, Paula and Richard decided to make a kite.
First they went out and found two straight sticks of the same length. They brought them back home and tied them with a piece of string into the shape of a cross. Then they took some string and used it to tie the four ends of the sticks together. Then, they spread some brightly coloured paper over the frame and glued it around the string.They stuck a tail made of paper to one of the corners, and tied a long string to the centre of the kite.
On the next windy day, they took the kite to a hill near their house and flew it.
一天,保罗和理查德决定做一个风筝。
首先,他们出门找了两根一样长的直木棍。他们把木棍带回家,用一根绳子把它们绑成十字形。然后他们又拿了些绳子,把木棍的四个顶端连在一起。然后,他们把一些颜色鲜艳的纸涂上胶水,粘在风筝的框架上。他们将纸做的尾巴粘在一角,在风筝中间系上一根长绳。
在接下来的一个有风的日子里,他们就在家附近的小山上放风筝了。
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