Every time you do the experiment T in equilibrium with the heat bath at T, v2 you'll get the same p2 and V2.

与热库相接触的每次实验中,达到热平衡后的温度都是，压强都是p2，体积都是。

麻省理工公开课 - 热力学与动力学课程节选

OK, we're going to do this reversibly, which means we're going to slowly change the external pressure very, very slightly at a time, so that at every point we're basically in equilibrium, p2/ until the pressure reaches a new smaller pressure p2.

整个过程保持可逆，外界压强,变化得很慢，每一个瞬间,都保持平衡，直到压强减小到末态值。

麻省理工公开课 - 热力学与动力学课程节选