如果你不能真正深刻地理解这个，你会发现自己很困惑。

If you don't really understand this deeply, you'll find yourself getting confused a lot.

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如果你感到迷失或困惑，那就寻求帮助。

If you're feeling lost or confused, ask for help.

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如果身体的变化让你感到伤心困惑，出去散散步，逗逗小狗，或者和朋友一起玩玩飞盘，也许会有点用。

If your changing body has you feeling sad or confused, it may help to go for a walk, play with your dog, or throw a Frisbee with your friends.

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And, if you ever get confused, the way to remember these is that you know energy is the integral of a force moving through a distance.

如果你感到很困惑的话，可以这么来记,能量是在沿力的方向进行路径积分。

麻省理工公开课 - 固态化学导论课程节选