And so an experiment said the gas didn't increase its temperature when it expanded the vacuum.

这个实验告诉你,气体在向真空膨胀的过程,中温度没有升高。

麻省理工公开课 - 热力学与动力学课程节选

We call that inversion because on one side you end up cooling if you compress.

因为在这个温度的一边,当你压缩气体时气体降温。

麻省理工公开课 - 热力学与动力学课程节选

But now, so this is where the refrigeration comes in. So if you take a gas, and you're below the inversion temperature and you make it go through this irreversible process, the gas comes out colder from that side than that side.

这就是冰箱的原理,如果在低于转变温度,的情况下我们将气体经过,这个不可逆过程,气体出来的温度将比这边低。

麻省理工公开课 - 热力学与动力学课程节选