OK, so what we've gone through today is we've introduced covalent bonding, and we've figured out a way to quantify it.

好的，那么我们已经经历了,是我们已经介绍了共价键，我们已经想出了一种定量的方法来。

麻省理工公开课 - 固态化学导论课程节选

He's introducing the reader to a mode of vision different from the vision typically permitted him from within the poem's more or less straightforward, linear, narrative boundaries.

他在向读者介绍一种不同于这首诗里,直白的线状叙述的界限,或多或少已经容许他，显露出的设想有所不同的先见之明。

耶鲁公开课 - 弥尔顿课程节选

What I strive for is say something new and different, not to reiterate people, in the sense of giving them a kind of textbook, clarification or introduction.

我所追求的,是一些新的，不同寻常的东西，而不是去重复别人的话,给他们一本教材，一种阐述或是介绍。

麻省理工公开课 - 电影哲学课程节选