It allows you to define the concept of a thermometer. You have three objects, one of them could be a thermometer.

从热的物体流向冷的物体,由此我们可以定义温度，我们还可以用它来定义温度计：

麻省理工公开课 - 热力学与动力学课程节选

And these verbal descriptions lead to some pictures that I put up and I'll put up again about how you might try to accomplish something like run an engine or move heat from a colder to a warmer body.

这些言语的描述有助于你们理解我讲过的,而且还要再讲的一些物理图像,比如一台发动机,是怎么运行的,或热怎样从冷的物体传到热的物体。

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

That's common sense. This is part of your DNA, And then their final product is an object, a b which ends up at a temperature or a warmness which is in between the hot and the cold.

这是常识，是你的一部分，它们的最终产物是一个物体，其温度或温暖程度,介于热与,冷之间。

麻省理工公开课 - 热力学与动力学课程节选