And then of course, once we figure out why not, we try and fix it. but today I'm going to emphasize not how do you fix it, but how do you find out what's wrong.

我们就会去尝试着修复程序，但是今天我强调的,并不是怎么去修复，而是怎么找出来错误原因。

麻省理工公开课 - 计算机科学及编程导论课程节选