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

And if you all survive this exercise you'll be better for it.

如果看到对比后，还能够挺过来,说明你离坚强又近了一步。

耶鲁公开课 - 心理学导论课程节选