leave someone in the dark 瞒着某人

need-to-konw basis 该说的才说

keep it on the down low 保密

词汇实践

Why didn't you tell me you have a new boyfriend?

你为什么没有告诉我你有了一个新的男朋友?

Why would you leave me in the dark on that?

你为什么要瞒着我?

Details of my personal life are on a need-to-know basis.

我的个人生活细节我该说的才说。

I don't openly share a lot of personal information.

我不会公开分享很多的个人信息。

I need to know!!

我得知道啊!

Who is he? Don't worry.

他是谁?别担心。

I'll keep it down low for you.

我会为你保密的。