S. system. It is named for Isaac Newton, whose second law of motion describes the changes a force can produce in the motion of a body.
它以科学家牛顿的名字命名，牛顿的第二运动定律描述了力所能产生的物体运动状态的改变。
S. system. It is named for Isaac Newton, whose second law of motion describes the changes a force can produce in the motion of a body.
它以科学家牛顿的名字命名，牛顿的第二运动定律描述了力所能产生的物体运动状态的改变。
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