So, these on-changing properties that describe the state of the equilibrium state of the system are called state variables.

这些描述,系统平衡态的,变化的属性,就叫做状态变量。

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And so the set of properties that describes system equilibrium doesn't change.

这些描述系统的属性,平衡是不变的。

麻省理工公开课 - 热力学与动力学课程节选