In other words, we're taking advantage of the fact that we now know that quantity. In the case of the ideal gas we just have a simple model for it.

换句话说，我们可以利用我们已经,了解这个物理量的这个优势,对理想气体我们有一个简单的模型。

麻省理工公开课 - 热力学与动力学课程节选

In fact, a return of none, in that case.

这里就会有一个绝对返回值。

麻省理工公开课 - 计算机科学及编程导论课程节选