I've seen many people not react that way, and probably regret it.

我知道很多人没有这样做，现在他们可能后悔了。

斯坦福公开课 - 戴尔CEO-Michael.Dell谈创业和发展课程节选

Versus looking at, for example, helium or neon or argon, these are all inert gases, inert meaning essentially do not react, those were grouped together in the periodic table.

相反，他发现氦，氖，氩，都是惰性气体，惰性的意思是基本不参与化学反应，因此把它们放在周期表中的同一类里。

麻省理工公开课 - 化学原理课程节选