p1 I said let's do this slowly enough that this p1 is in equilibrium with this p1, but not so slowly that this pressure is equivalent to that pressure.

我曾说过我们足够慢地使这边的1,与这边的p1平衡，但是没有慢到,这里的压强等于这里的压强。

麻省理工公开课 - 热力学与动力学课程节选