那么我为什么要解释这么多呢？

So why am I explaining all this?

youdao

我想这就是要我解释一下我为什么到这里来。

I think that's my cue to explain why I'm here.

《牛津词典》

它说了应该做什么；它解释了为什么要这样做；它鼓舞了应该这样做的人。

They said what had to be done; they announced why it had to be done then; they inspired those who had to do it.

youdao

It would be utterly inadequate for us to account for this institutional and surreal institutional power that Milton holds over us by stating blandly that Milton is the greatest English poet.

要解释弥尔顿为什么能对我们施加,这样硬性的甚至荒诞的控制,仅仅说弥尔顿是最伟大的英国诗人是远远不足的。

耶鲁公开课 - 弥尔顿课程节选

This explains why we sleep at all and this probably explains why we sleep at night.

这个解释了我们为什么要睡觉,这个解释了我们为什么在晚上睡觉。

耶鲁公开课 - 心理学导论课程节选

It's a little bit complicated exactly how.

要解释为什么有点复杂。

麻省理工公开课 - 计算机科学及编程导论课程节选