I'm baffled why she hasn't called.

我不明白她为什么没打电话。

《牛津词典》

I'm baffled as to why she hasn't called.

我不明白她为什么没打电话。

《牛津词典》

I could never understand why she was fired.

我怎么也不明白她为何被解雇。

《牛津词典》

Eartha Kitt said the First Lady asked her why she thought there was so much youth crime in America.

VOA: special.2009.06.07

You'll find Eve in Book Nine of Paradise Lost voicing essentially this same sentiment when she's explaining to Adam why she needs to work separately.

你会在失乐园第十部看到夏娃说出了实际上是,同样的意见，当她向亚当解释,她需要和他分开工作的时候。

耶鲁公开课 - 弥尔顿课程节选

I don't know why she dislikes me.

我真不明白她为什么不喜欢我。

I don't know 课堂 - SpeakingMax英语口语达人

That's why she does not use the company plan for savings beyond the 3%.

FORBES

Cheung's husband wonders why she pays to work for others, even if it is deductible.

FORBES: Magazine Article

Who knows why she said it or what she meant, but I did it.

CNN: 'Gilmore Girls' reunion? Someday, someday, maybe