名词
中文翻译：主席
同义词：
['president', 'chair', 'chairperson', 'chairman']
例句：
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1. The presidentis expected to deliver the keynote speechat the conference.
预计总统将在会议上发表主旨演讲。
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2. He was appointed as the chairperson of the committee.
他被任命担任委员会的主席。
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3. The chairman of the board hasdecided to resign.
董事会主席已决定辞职。