B=0 There's going to be some temperature where B is equal to zero. In that case, your gas is going to look awfully like an ideal gas.

在某个温度,这时，实际气体的表现，十分接近理想气体,高于这一温度它是正的。

麻省理工公开课 - 热力学与动力学课程节选

There's p1 here, and p2 here So I'm starting at p1, V1. I'm starting right here And I'm going to end right here.

它的分子间作用力很小,十分接近理想气体,对它做一个压缩过程。

麻省理工公开课 - 热力学与动力学课程节选