参议员显然因这意想不到的问题而不知所措。

The senator was clearly caught off balance by the unexpected question.

《牛津词典》

你可以在公司城度过一生而不知何谓真正的自由。

You could pass a lifetime in a company town without knowing any real freedom.

youdao

负责管理项目的人只知去做，而不知为何去做。

People in charge of managing projects are subject to constraints that keep them somewhat in the dark.

youdao

So that you're not just handed something that's entirely new to you with no idea which direction to go, we actually do set you off on an appropriate path.

这样一来就不会因为面对完全陌生的东西,而不知何去何从了，我们真心希望能把你们带到正确的道路上来。

哈佛公开课 - 计算机科学课程节选

It's all similar in that it reminds us of the connection that we have, when we really are feeling fully present, and not mindless, and unaware of everything around us, and our place and our connection.

大同小异，都提醒我们,我们之间的联系，我们真切地感受到当下，而不是漫不经心，不觉周围事物，不知我们之所在和我们的联系。

普林斯顿公开课 - 人性课程节选

We know some parts of it, we don't know all of it.

我们只知其一,而不知其二

耶鲁公开课 - 生物医学工程探索课程节选