Now, as obvious a statement as that is in this algorithm, it turns out that is the key to this whole problem being solved correctly without my algorithm looping infinitely.

这是此算法中很明显的一句话，也是正确解决,整个问题的关键,否则此算法就会陷入死循环。

哈佛公开课 - 计算机科学课程节选

How do I figure that out? Well I'm looping down the list, right? I'm walking down the list.

怎么算出来的呢？我在循环遍,历这个列表对吧？那要遍历这个列表。

麻省理工公开课 - 计算机科学及编程导论课程节选