So it applies to macroscopic systems that are in equilibrium, and how to go from one equilibrium state to another equilibrium state, and it's entirely empirical in its foundation.

因此，热力学研究的是平衡态的宏观系统,以及如何从,一个平衡态过渡到另一个平衡态，它完全是建立在经验的基础上的。

麻省理工公开课 - 热力学与动力学课程节选