chairman

主席、會長

The chairman opened the meeting with a short welcome speech.

主席以一段簡短的歡迎詞開場。

董事長

The chairman of the board resigned after a series of losses.

在一連串虧損之後，董事長辭職了。

系主任、主任委員

She served as chairman of the history department for six years.

她擔任歷史系系主任六年。

主持、擔任主席少用

He chairmanned the committee through its most difficult year.

他在委員會最艱難的一年裡擔任主席。