We lose kinetic energy when there is a completely inelastic collision.
我们失去了动能，这是完全非弹性碰撞。
In the collision between nature and technology, most of The Times, the animals lose.
在自然和科技的碰撞中，大多数时候动物们都是输家。
And then there is a case of which we have seen several examples last time of inelastic collisions, when you lose kinetic energy, so this is an inelastic collision.
有这样一个例子，这种情况，我们上节课就见过几个，它们是非弹性碰撞，当失去动能时，它是非弹性碰撞。
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