And the way to tell it doesn't have parts is because it's invisible, because invisible things can't have parts.

辨别它是否有部分的方法,是因为它是无形的，因为无形的东西没有部分。

耶鲁公开课 - 死亡课程节选

Let me write a function, in fact the literal thing I would do is to say, identify the things that change, give each of them a variable name because I want to refer to them, and then write a function that captures the rest of that computation just with those variable names inside.

让我来写个方法,实际上我的意思是，辨别出变化的东西,然后给它们逐个命名以区分,然后写一个用来计算,这些变量的,包括计算过程的方法。

麻省理工公开课 - 计算机科学及编程导论课程节选