And,for people that have no written history, language can be one of the ways that that history can be gotten at just by looking carefully at the different layers in the language."

VOA: special.2009.12.02

Well, there you can see it. Sure better have gotten small because in fact it has to be zero.

这一项很小是很好的,因为实际上必须是零。

麻省理工公开课 - 热力学与动力学课程节选