"How come we never know what's going on?" he groused.

“我们怎么会不知道发生了什么事？”他抱怨道。

《柯林斯英汉双解大词典》

My dear, we never know what life may have in store for us!

亲爱的，我们永远不知道未来的生活会是什么样子！

youdao

It is a wise choice to put some money aside for emergency as we never know what will happen tomorrow.

存点钱以备不时之需是明智的选择，因为我们永远不知道明天会发生什么。

youdao

"The court of appeals is where policy is made, and I know this is on tape and I should never say that because we don't make law.I know,I know.

VOA: special.2009.05.30

Because what we want to know is what is like to be permanently dead, and these people were never permanently dead.

因为我们想知道的是,永久死去是什么样的,而这些人并没有永久地死去

耶鲁公开课 - 死亡课程节选

Now we will never know, and don't let anyone ever suggest to you that you will ever know, what Milton could possibly mean by this deliberately perplexing image of the two-handed engine at the door.

我们永远不会知道,弥尔顿在这句描写门边的双手引擎的,刻意的意象叠加里想要表达什么。

耶鲁公开课 - 弥尔顿课程节选

We never know for sure what the mechanisms for some of these drugs are.

FORBES: The Statin Showdown

But as I've said, backs are tricky and we never know how exactly they're going to react.

WSJ: Yankees INF Youkilis happy with back prognosis

That's an interesting possibility, but we never know from the script what take we're supposed to have.

BBC: Bombay Dreams