Workers were kept in the dark about the plans to sell the company.

工人全然不知出售公司的计划。

《牛津词典》

The investigators admit that they are completely in the dark about the killing.

调查人员承认他们对这起凶杀案一无所知。

《柯林斯英汉双解大词典》

They are kept in the dark about many details of their job.

关于他们工作的许多细节，他们被蒙在蒙里。

youdao

They are hoping to learn more about dark matter in an effort to better understand how the universe expands and shrinks.

VOA: special.2009.07.21

Of course, it gets dark in the winter in St. Petersburg about noon.

不过,冬天的圣彼得堡中午之后就天黑了

耶鲁公开课 - 欧洲文明课程节选

And the myth has to do with these sort of pictures I was just describing where we don't actually live on the surface of the Earth of in the light, but rather live in certain hollows in the dark where we're mistaken about the nature of reality.

那个传说与我一直形容的,这个大局有关,我们并不真正生活在地表,生活在阳光里,而是生活在某种暗无天日的黑洞中,一个我们都误解了现实本质的地方

耶鲁公开课 - 死亡课程节选

Congress is largely in the dark about what the administration has been negotiating in the TPP.

FORBES: Obama's Trade Policy Should Be Judged on Its Accomplishments, Not Its Promise

The SEC also claimed that Quantek kept investors in the dark about certain related-party transactions involving Guerra.

FORBES: SEC Charges Formerly $1 Billion Hedge Fund With Misleading Investors

Across most of Asia, however, banks are still in the dark about people walking into their branches.

ECONOMIST: Consumer finance in Asia