It is gravitation that causes the apple to fall.是地心吸引力使苹果下落.We owe to Newton the principle of gravitation.万有引力原理的发现应归功于牛顿.The law of gravitation explains many phenomena not previously, understood.引力定律解释了许多以前所不能理解的现象....
By gravitation the sun and planets act and react upon one another.太阳与行星通过引力发挥作用并相互影响。He also propounded the Heliocentric theory of gravitation, thus predating Copernicus by almost one thousand years.他也提出以引力作用为基础的日心说, 比哥白...