牛顿的万有引力定律是极其有用的。

Newton's law of universal gravitation has been extremely useful.

youdao

牛顿的万有引力定律指的是两个质点之间的力。

Newton's law of gravitation refers to the force between two particles.

youdao

正是有了牛顿的万有引力定律，我们才能计算出任意两物体间的引力。

Thanks to Newton's universal law, we can figure out the gravitational force between any two objects.

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