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。

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

youdao

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。

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

youdao