So what they do is, they're describing how these thermodynamic properties change, in terms of only state functions and state variables.

他们的作用是描述,随着状态函数和状态变量的变化，系统的热力性质如何变化。

麻省理工公开课 - 热力学与动力学课程节选

G Here, A and G, we've already got as functions of these easily controlled, conveniently controlled state variables.

这里，A和，我们已经把它们写成了，容易控制的状态变量的函数。

麻省理工公开课 - 热力学与动力学课程节选