本文以热力学第一定律和第二定律为基础，用可逆热机的运转来建立温度概念。

In this paper the definition of temperature founded on the first law and second law of thermodynamics is evolved by the operation of reversible heat engine.

youdao

So, over the last few lectures we've worked and struggled so formulate the second and third laws of thermodynamics in addition to the first.

在前几次课中,我们通过努力明确的,给出了热力学,第一，第二和第三定律。

麻省理工公开课 - 热力学与动力学课程节选

So what we're going to do is consider the first and second laws.

我们需要考虑的是,热力学第一和第二定律。

麻省理工公开课 - 热力学与动力学课程节选