in the dark
US /ɪn ðə dɑːrk/
UK /ɪn ðə dɑːrk/

1.
一无所知, 蒙在鼓里
not knowing about something important, because other people have not told you about it
:
•
The employees were kept in the dark about the company's merger plans.
员工们对公司的合并计划一无所知。
•
I'm completely in the dark about what's going on.
我对正在发生的事情一无所知。
2.
在黑暗中, 在没有光的地方
in a place where there is no light
:
•
I couldn't see anything in the dark room.
我在黑暗的房间里什么也看不见。
•
He was afraid to walk home alone in the dark.
他害怕在黑暗中独自走回家。