The rockets take astronauts and man

The rockets take astronauts and man-made satellites into space. The satellites are used for communication, weather monitoring and research. But how do satellites stay up without falling down?
There are two opposite forces acting on the satellite. One of them is the force of gravitation, which tries to pull the satellite towards the earth. The other force is created by the rotation (旋转) of the satellite around the earth. This force tries to take the satellite away from the earth. With these two forces, the satellite goes round and round. The gravitational pull of the earth (the force which pulls everything towards the ground) is like a rope which keeps the satellite from flying away.
Everything that goes up has to come down. It is only a matter of time before a satellite comes back to the earth. As time goes by, the satellite loses its speed, which makes the gravitational pull stronger than the force pulling it away. This makes the satellite crash down to the earth.

結果 (中文) 1:

火箭搭载宇航员人造卫星送入太空。卫星用于通信、 天气监测和研究。但如何做卫星熬夜没有掉下来呢？有两个相反的力卫星上。其中之一是重力，试图拉向地球卫星。其他力是由卫星绕地球的旋转 （旋转） 创建的。这支部队试图采取远离地球的卫星。与这两股力量，这颗卫星不停地旋转。（把一切都向地面部队） 地球的引力是像一根绳子，让卫星飞走了。所有一切，上去了下来。它只是时间的问题之前卫星又回到了地球。随着时间的流逝，卫星丢失它的速度，这使得比力推开它强大的引力。这使得卫星坠毁在地面上。

結果 (中文) 3:

火箭把宇航员和人造卫星送入太空。卫星用于通信、天气监测和研究。但是，卫星是如何不落下来的呢？有两个相反的力量作用在卫星上。他们中的一个是引力的力量，试图把卫星拉向地球。其他的力通过旋转创造（旋转）卫星绕地球。这种力量试图把卫星从地球上带走。有了这两种力量，卫星绕着一轮又一轮的。地球的引力（把一切东西向地面的力量）就像一根绳子，使卫星不飞。所有上下的东西都要下来。在一颗卫星回到地球之前，这只是时间问题。随着时间的推移，卫星失去了它的速度，这使得引力的拉力比牵引它的力量更强大。这使得卫星坠落到地球上。