我们一开始有四个变量：，温度，压强，某个组分在液体中的比例，和它在气体中的比例。

We started out with four variables; the temperature, the pressure, and the components in the composition in the liquid phase and the composition in the gas phase.

youdao

你只需要某些你非常熟悉的宏观变量，比如压强，温度，体积，每个组分的摩尔数，系统的质量。

You just need a few macroscopic variables that are very familiar to you, like the pressure, the temperature, the volume, the number of moles of each component, the mass of the system.

youdao

但是现在，这里不再是以液相的组分比，作为变量，而是以气相的组分比作为变量。

But now, it's not as a function of the composition at the liquid phase it's a function of the composition in the gas phase.

youdao

You just need a few macroscopic variables that are very familiar to you, like the pressure, the temperature, the volume, the number of moles of each component, the mass of the system.

你只需要某些你非常熟悉的宏观变量,比如压强，温度，体积，每个组分的摩尔数，系统的质量。

麻省理工公开课 - 热力学与动力学课程节选