There's a zeroth law The zeroth law every one of these laws basically defines the quantity in thermodynamics and then defines the concept.

有第零定律,这些定律中的每一条都定义了,热力学中一个基本物理量的概念,第零定律定义了温度。

麻省理工公开课 - 热力学与动力学课程节选

And that's the zeroth law thermodynamic.

这就是热力学第零定律。

麻省理工公开课 - 热力学与动力学课程节选

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