dS/dV And that, now, we know must equal dS/dV, with a positive sign. At constant temperature.

我们知道这个等于恒定温度下的，符号为正。

麻省理工公开课 - 热力学与动力学课程节选

It's nR log of p2 over p1 for the process where there's a pressure change.

结果是dS等于nR乘以p2除以p1的对数,这是对压强变化的结果。

麻省理工公开课 - 热力学与动力学课程节选