Leave a line there and think about it and fill in the blanks later.

画几条线,仔细想一想,然后补上这个漏洞

耶鲁公开课 - 基础物理课程节选

I'm going to actually get caught up, make up for but Bawendi's slow lecturing.

我得抓紧了，补上Bawendi上次没讲的内容。

麻省理工公开课 - 热力学与动力学课程节选