It relates the pressure, volume, and temperature together.
它把压强、体积、温度联系在一起。
Most processes that we're concerned with will happen with something held constant like pressure or temperature or volume.
我们关心的大多数过程都是在保持压强、温度或体积不变的情况下发生的。
You know how pressure changes with temperature at constant volume if you know the equation of state.
如果你知道状态方程，知道在体积恒定的时压强如何随着温度变化。
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