But conservative systems let you do much more than that.

在任何时候，但剪贴板系统 它使您能够做更多事情。

A conservative system is one that doesn't lose energy through work.

防腐系统是一种不会丢失的系统 通过行动获得能量。

Like the conservative systems we talked about last time, in elastic collisions, kinetic energy is neither created nor destroyed.

就像我们上次谈到的剪贴板系统一样 过去，在弹性碰撞中，能量。