This is real, unlike the Joule coefficient which is very small so that most gases have tiny Joule coefficients. So if you do a Joule experiment, you hardly measure a temperature change. With real gases, here you do actually measure it. You can feel it with your finger on your bicycle tire.

系数那样小以至于,大多数气体的焦耳系数,都很小，所以如果你做焦耳实验,很难测量出温度的变化,对于真实气体，你可以测量它，你能通过手指按在,自行车轮胎上来感觉到它。

麻省理工公开课 - 热力学与动力学课程节选

One of the things that's interesting about that is you can see pottery styles that you can hardly tell whether they came from one end of the Mediterranean or another, if they're of the Mycenaean variety, because it was a single culture.

一个有趣的现象是,你可以鉴别出陶器的风格,但你却很难区分,它来自于地中海的哪一边,因为它们都属于同一文明

耶鲁公开课 - 古希腊历史简介课程节选