So first, let's start with the one that we already know, and make sure that it still works, starting from here, mainly our isolated system.

首先，我们从我们已知的一个例子入手，看看这个判据是否正确，从绝热系统出发。

麻省理工公开课 - 热力学与动力学课程节选

Let's say we start from some V1 and p1 here, so high pressure, small volume and we end up with a high volume low pressure, under constant temperature condition.

例如我们要从压强比较高，体积比较小V1，p1出发,到达低压强，大体积的末态，过程中温度不变。

麻省理工公开课 - 热力学与动力学课程节选