That's the stuff you just said.

就是刚才你说的东西。

But I know, all too well, that's the stuff.

但是我很清楚，我太清楚，那正是。

I did not cry. that's the stuff I did today.

这就是我今天做的事情。

But that's the stuff you use to clean engine parts!

但溶剂是用来清洗发动机零件的东西啊！

Do not squander time — that's the stuff life is made of.

不要浪费时间，因嘒生命由它而成。