噢，一个戴着帽子的男人。

Oh, the man with a hat.

youdao

迪蒂又按了一次铃，看见一个头上戴着漂亮白帽子的姑娘从楼梯上下来。

Deta, ringing again, saw a girl with a brilliant white cap on her head, coming down the stairway.

youdao

其中一个女孩子戴着一顶帽子，帽子上两种颜色对比鲜明，这代表她的阶层。

One of the girls wore a cap of two staring colors, denoting the class of persons to which she belonged.

youdao

So it's true that Ale knows that at least one person in the room has a pink hat on their head.

所以艾尔确实知道,至少有一个人戴着粉色的帽子

耶鲁公开课 - 博弈论课程节选

I saw an old lady wearing a big classical hat today.

今天我看到一个年迈的女人戴着一顶很大的复古帽子。

英国皇家赛马会 - SpeakingMax英语口语达人

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