On May twenty-third, the lander rejoined the command module one hundred kilometers above the moon.

VOA: special.2009.07.08

Now I got one just simple thing, and I simply have isolated that module inside of that function.What about abstraction?

而现在我只要做一件简单的事，那就是我只需把这个模块,加到函数中去？

麻省理工公开课 - 计算机科学及编程导论课程节选

It had three major parts. One was the command module.

VOA: special.2009.07.22