Now, I wanted to go to through this just to go through one cycle quickly because we're going to be doing these all the time, and the importance of the fact that the path doesn't matter, and you can always connect things together in a way, whatever you want.

我使用这种,利用热力学循环的推导方法的原因在于,今后我们，将经常使用类似的方法,大家要记住路径是无关紧要的，可以随意选取一条路径,来连接两个态。

麻省理工公开课 - 热力学与动力学课程节选