Let me just back up a second.

让我来说说从前

耶鲁公开课 - 古希腊历史简介课程节选

Having done that, it goes back up and picks the second sub-list, which came from there. It's a down to base case, merges it.

就是从那里得来的,完成这些后,回到上一步。

麻省理工公开课 - 计算机科学及编程导论课程节选

One hour of recitation a week, on Fridays, and we'll come back in a second to how you're going to get set up for that.

周五是每周一小时的复习课，一会儿我们来说,怎么去准备那个课。

麻省理工公开课 - 计算机科学及编程导论课程节选