1. Eleven point two kilometers per second, at which satellites can be freed from the gravitation of the earth, is called "escape speed". 卫星以11.2千米每秒的速度前进可以脱离地球引力,这被称为“逃逸速度”。
2. Where is the gravitation tank? 重力水柜在哪里?
3. This is called gravitation, or gravity. 这叫引力。
4. Finally he found the great gravitation law. 最后他发现了伟大的引力定律。
5. Planetary motion is also a result of gravitation. 行星的运动也是引力的结果。