You can only do this because it's reversible. What else do I know?

这一步,只对可逆过程成立，还有什么已知条件？

麻省理工公开课 - 热力学与动力学课程节选

Well, if you're a poor farmer, you don't know what else to do.

如果你是一个贫困的农民,你不知道自己能干什么

耶鲁公开课 - 古希腊历史简介课程节选

But you agree that there is no reason why somebody else couldn't come along and say, "You know what, I want to use a different set of axes.

但是你们得认识到,没有人会站出来说,"我想要用一套不同的坐标系

耶鲁公开课 - 基础物理课程节选

What else do you need to know?

你还需要知道什么？

麻省理工公开课 - 热力学与动力学课程节选

You've got to make sure that if you explain to others how to do this problem, then somebody else contributes to something else, but you know what everybody contributed in the end.

你得能保证,如果你和别人解释了题目的解法,然后另一个人对别的题目又有独到见解,最后你知道每个人都没有浑水摸鱼

耶鲁公开课 - 基础物理课程节选