What that's going to allow us to do is, if we say, OK I have a mixture of stuff, how does the free energy change?

我们能够说的是，如果我们有一份混合物，自由能怎么变化？

麻省理工公开课 - 热力学与动力学课程节选

so anything that's free is always good, so usually outdoors stuff.

任何免费的东西我认为都是不错的，所以我经常去户外走走。

对政治很感兴趣 - SpeakingMax英语口语达人