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

Without knowing why, I had become attached to the White Tara.

不知为何，我开始依赖白度母。

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

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