In many example of mechanical motion, there is an interchange between kinetic and potential energies.

在很多机械运动的实例中，有一种是动能和势能之间的相互转化。

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In many example of mechanical motion, there is an interchange between kinetic and potential energies.

在很多机械运动的实例中，有一种是动能和势能之间的相互转化。

youdao