So in this experiment here, delta p is less than zero. You need to have this whole thing greater than zero. So delta T is less than zero as well. So if you're below the inversion temperature and you do the Joule-Thomson experiment, you're going to end up with something that's colder on this side than that side.

所以在这个实验中，Δp小于零,这全部都大于零,因此ΔT也小于零,所以如果在低于转变,温度的情况下做焦耳-汤姆孙实验,最后的结果是,这边的温度比这边低。

麻省理工公开课 - 热力学与动力学课程节选

OK, for most gases, T inversion is much 300K greater than 300 degrees Kelvin. Much greater than room temperature.

好，对大多数气体,转变温度都高于,比室温高很多。

麻省理工公开课 - 热力学与动力学课程节选

If T is less than T inversion, you have the opposite case, and dT/dp is greater than zero.

如果T比转变温度低,情况就相反，偏T偏p大于零。

麻省理工公开课 - 热力学与动力学课程节选