You do not know whether what you're told is true or false.

你不知道别人告诉你的是真的还是假的。

《柯林斯英汉双解大词典》

I do not know what to do with the information if I cannot pass it on.

如果无法传送出去，我不知道该拿这情报怎么办。

《柯林斯英汉双解大词典》

My dear children, I do not know.

我亲爱的孩子们，我不知道。

youdao

"Aylmer," said Georgiana, "I do not know what the cost would be to both of us to remove this birthmark.

VOA: special.2009.09.26

He says, "I believe in the practice and philosophy of what we have agreed to call magic, in what I must call the evocation of spirits, though I do not know what they are."

他说我相信我们所称作的,关于魔法的实践和哲学，我认为那是对灵魂的召唤，尽管我并不知道它们是什么“

耶鲁公开课 - 现代诗歌课程节选

and they do not know how to fix the tire.

而车上的人对此束手无策。

I can 课堂 - SpeakingMax英语口语达人

An answer of "I do not know" is unacceptable and I could only get insurance on nominating one.

BBC: NEWS | Programmes | Inside Money | Have your say: insurance 'fronting'

The details will have to be negotiated with Congress, so we do not know how it all works.

NPR: Listeners' Money Questions Answered

For instance, Britain's donors, argues Lord Joffe, often do not know how much they should give.

ECONOMIST: Why a new golden age of philanthropy may be dawning