we can run the engine backward and build a refrigerator, if you've got your lecture notes from last period your 8-9, well, they're labeled 8-9 lecture notes, I made an attempt to define something which was a little bit misguided.

现在我们可以把热机倒过来,制作一台制冷机，如果你们拿出上节课的笔记,也就是8-9节，好的，他们在8-9节，当时我试着,定义了一些,有些误导你们的物理量。

麻省理工公开课 - 热力学与动力学课程节选

He does go around and around the same idea a number of times, which does cut down on the notes for the class, " but it can get a little boring."

他的确一遍遍重复同样的观点很多次，从而减少了课程的笔记内容，但是会让人感到有点无聊“

耶鲁公开课 - 死亡课程节选