OK, now what I want to do is just describe a little bit of how do you measure all this stuff, right?

好，现在我要做的就是,介绍一下怎样来测量这些东西？

麻省理工公开课 - 热力学与动力学课程节选

So, let me begin by doing a little bit of background so you know what's going on here.

首先，我要做一下背景介绍,你们就能了解情况了。

麻省理工公开课 - 固态化学导论课程节选