It has a head, but no neck.

打一动物种类 它有头，没有颈。

youdao

It has a head, but no neck. It has a body, but no warmth, no feet, but can travel?

它有头，但没脖子；有身体，却没温度；没有脚，但是能旅行。它是什么？

youdao

It has a head, but no neck. It has a body, but no warmth. No feet, but can travel?

它有头，但没有脖子，有身体，但不温暖，没有脚，却能旅行。

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

And it's true that Kaj knows that Ale has a pink hat on his head.

而且卡佳也知道艾尔戴着粉色的帽子

耶鲁公开课 - 博弈论课程节选

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

"We had always expected a gap-filler with typically intermediate features such as a moderately elongate tail -- neither long nor short -- but the strange thing about Darwinopterus is that it has a head and neck just like that of advanced pterosaurs, while the rest of the skeleton, including a very long tail, is identical to that of primitive forms, " he said.

CNN: Pterodactyl fossil fills gaps in evolutionary tale

As a first time independent traveler, it has been a great head-clearing trip of a lifetime.

FORBES: Rafat Ali Returns From the Wilderness

For those reasons, Sprint calculates that it has a two-year head start over companies like Verizon, regional carrier MetroPCS and startup LightSquared.

FORBES: Sprint Says It Has Two-Year Head Start Over Verizon With 4G