我不知道为什么回力镖会攻击植物，也不知道神奇的悬停电脑显示器是在协助攻击还是逃离现场。

I have no idea why a boomerang is attacking a plant or whether the magical hovering computer monitor is aiding in the attack or fleeing the scene.

youdao

我不记得这些架是怎么打起来的了，也不知道为什么打，但我曾经热爱它们。

I don't remember how the fights started or why but I used to love them.

youdao

我是说，我也不知道她为什么会这么做。

I mean, I don't know why she would.

youdao

In fact, I do this as well, I mean I have water with me and I have no idea why because I'm not particularly dehydrated.

事实上,我也整天带着水壶,我是说我随身带水,但又不知道为什么要带,因为我并没有特别的脱水症状

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The third derivative, unfortunately, was never given a name, and I don't know why.

遗憾的是三阶导数没有专门的名称,我也不知道这是为什么

耶鲁公开课 - 基础物理课程节选