Let's just take hydrogen and nitrogen in the gas phase and form ammonia.

我们利用氢气和氮气,合成氨。

麻省理工公开课 - 热力学与动力学课程节选

And, although you think that nitrogen, I mean, it's an inert gas.

尽管你认为那是氮气，我的意思是，它是一种惰性气体。

麻省理工公开课 - 固态化学导论课程节选

You take your room temperature liquid helium and you cool it with liquid nitrogen to 77 degrees Kelvin, the new, you're not quite there yet 77k unfortunately right? Then you take hydrogen you cool it would liquid nitrogen to 77, then you can use your hydrogen gas.

首先要有常温的氦气,拿液氮把它冷却到77k，那个新来的7,你不坐在那儿，对吧？,然后用液氮把氢气降温到,然后就可以使用这个氢气了，想要用氢气来做焦耳-汤姆孙实验。

麻省理工公开课 - 热力学与动力学课程节选