Chair作“椅子”讲基本学过英语的人都知道，其实这个词还有“n.(主持会议或委员会的)主席席位;委员长职位;(会议或委员会的)主席;委员长;(大学的)系主任或教授v.担任(会议、讨论等的)主席;主持(会议、讨论等)”,如：

in the chair =take the chair担任主席；主持（会议）

Who will be in the chair tomorrow’s meeting?

谁主持明天的会议？

She takes the chair in all our meetings.

她主持我们所有的会议。

Who is in the chair today?

今天谁主持？

Wheeler took the chair of this sub-committee

惠勒担任该小组委员会会议主席。

In the chair was Morien Morgan

会议由莫里恩·摩根主持。

Finance Ministers are meeting today in Brussels with Britain in the chair.

财政部部长们今天在布鲁塞尔碰头，会议由英国主持。

He was elected chair of the city council.

他当选为市议会主席。

He has been appointed to the chair of sociology at Southampton University.

他被任命担任南安普敦大学的社会学教授一职。（大学教授）

She is the chair of the Defense Advisory Committee on Women in the Military.

她担任军队女性权益保护顾问委员会主席。

动词：

He was about to chair a meeting in Venice of EU foreign ministers...

他将主持在威尼斯召开的欧盟外长会议。