他们为什么不明事理？

Why can't they see reason ?

《牛津词典》

我怎么也想象不出他们为什么要走。

I cannot for the life of me imagine why they want to leave.

《牛津词典》

我真无法理解他们为什么会选他。

It's a complete mystery to me why they chose him.

《牛津词典》

And I don't know why, but since time immemorial that is the way computer scientists have drawn trees.

叶子是在最下面的，我不知道为什么,但从记事以来他们就是这么画树的,这也许就是为什么我们。

麻省理工公开课 - 计算机科学及编程导论课程节选

And she was able to tell me that they can divine from the hits on their site why people are coming to that site.

她告诉我，他们可以从网站的点击次数,推断出人们为什么访问他们的网站。

普林斯顿公开课 - 人性课程节选

And we'll discuss the current research and why people get these disorders and what's the best way to make them better.

我们将会讲到当前的研究成果,解释为什么人们会患有这种心理障碍,以及什么才是治疗他们的最好方法

耶鲁公开课 - 心理学导论课程节选