Your guard is up and I know why.

你又变得戒心重重，我懂的。

youdao

And I know why you and Daddy got a divorce.

我还知道你为什么和爸爸离婚呢！

youdao

The little girl said, "I just know." And I know why you and Daddy got a divorce.

小女孩说：“我就是知道，而且我知道你和爸爸为什么离婚了。”

youdao

And that is why I want you to know that I am absolutely committed to moving forward with you and forging a new and better future together,"

VOA: standard.2009.11.05

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

But for me, I like to look at something and just say, "I like this. I don't really know why though."

但对我来说，我喜欢看着某个东西，然后说，“我喜欢这个。但我也不知道为什么。”

关于现代美术 - SpeakingMax英语口语达人

But I have seen the world from a boxcar door, and I do know why once you've hopped a freight train it's killing hard to stay away.

NPR: Hobo, Interrupted, Still 'Dreams of Trains'

And I don't know why I do, except perhaps for what we'd named the dolls - toenail and fingernail.

NPR: Watching a Memory Shift over Time

"I love Oxfordshire, and the longer I stay the more I discover, and wonder why I hadn't know about it before" she says.

BBC: Presenter Profile: Jo Thoenes