All right, last time we talked exclusively about completely inelastic collisions.

好，上节课，我们只讲了，完全非弹性碰撞。

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And in the case of the completely inelastic collisions that we have seen last time, we lost kinetic energy, which was converted to heat.

在这个例子中，它是完全非弹性碰撞，我们上节课也看到了，我们失去了动能，它可能转化为热量。

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