the zeroth law, which is the common-sense law, which says that if you take a hot object next to a cold object, heat will flow from the hot to the cold in a way that is well defined, and it allows you to define temperature.

上节课我们讨论了，热力学第零定律,这一定律源自常识：如果把一个热的物体,与一个冷的物体挨在一起，热量就会以确定的方式。

麻省理工公开课 - 热力学与动力学课程节选

Well, that may seem to be the most natural way to define death, but it's not an acceptable approach.

这似乎是定义死亡的最自然的方式，但并不是可以接受的方法。

耶鲁公开课 - 死亡课程节选

So that means, then, you've got to define the pressure pretty well.

水的沸点也不一样，水的冰点的情况也一样。

麻省理工公开课 - 热力学与动力学课程节选

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