She felt, without knowing why, that the gaiety was assumed.

她不知为什么，总觉得这种快乐是假装的。

youdao

Too many people are wasting time and energy in relationships without knowing why they are there.

有太多的人，他们在不同的关系中浪费着时间和精力，却不知道自己为什么这样做。

youdao

Then, without knowing why, I put my finger into my throat and spewed up the dates I'd eaten.

然后，不知为什么，我把手指伸进喉咙，把刚才吃的椰枣都吐出来了。

youdao

So, either James Murdoch has to continue to plead ignorance, opening himself to the charge that he's the sort of guy who writes massive cheques without knowing why or asking questions which could and should have revealed what had really been going on.

BBC: Updates from inside James Murdoch hearing

Why would companies expand or invest without knowing their regulatory burden?

FORBES: Dodd-Frank Is The Very Definition Of Tyranny

Not knowing why he was being kept in the cell without food, water or a toilet for so long confused him, Iredale said.

CNN: Student forgotten in cell for 5 days will sue DEA