So what I'm doing here is I'm cooling, and then when I'm sitting at a fixed volume and I'm increasing the pressure, what am I doing? I'm heating, right?

对了，因此在这里，需要冷却,而在这里，当体积不变增加压强时？

麻省理工公开课 - 热力学与动力学课程节选

This is an example where the external pressure here is kept fixed as the volume changes, but it doesn't have to be kept fixed.

在我们举的这个例子中,外界压强不变，气体体积改变。

麻省理工公开课 - 热力学与动力学课程节选