So again, they both know that someone in the room has a pink hat on their head: it is mutual knowledge that there's a pink hat in the room.

但是他们都知道,至少有一个人戴着粉色帽子,至少有一顶粉色帽子是相互知识

耶鲁公开课 - 博弈论课程节选

You wanted to know your place in the universe, but you don't even have that kind of knowledge either, because you think you're writing novels, finding the cure for cancer, climbing Mount Everest.

你想知道自己在宇宙里的位置，但是你连那种知识都没有，因为你以为自己是在写小说，在寻找治疗癌症的办法，在攀登珠穆朗玛峰。

耶鲁公开课 - 死亡课程节选

Common knowledge is: "I know something, you know it, you know that I know it, I know that you know it, I know that you know that I know it, etc., etc. etc.: an infinite sequence.

共同知识是指,我知道一件事,你也知道这件事,你知道我知道这件事,我也知道你知道这件事,我知道你知道我知道这件事,以此类推,一个无限的循环

耶鲁公开课 - 博弈论课程节选