And they do that to localize the source of the problem.

他们会不断的减小,寻找空间来定位问题源。

麻省理工公开课 - 计算机科学及编程导论课程节选

See if we can find it here. And notice, by the way, that I commented out the previous debugging line, rather than got rid of it.

我们再去从它们的中间开始尝试，看看我们能不能发现问题源,顺便说一下，请注意。

麻省理工公开课 - 计算机科学及编程导论课程节选