同学你好，该知识点来自沪江网校《BEC商务英语初、中、高级连读【开学季特惠签约班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学好哦O(∩_∩)O~

两个词一个指人，一个指职位哦~

president
1. N-TITLE; N-COUNT 总统；国家主席 The president of a country that has no king or queen is the person who is the head of state of that country.  
...President Mubarak...
穆巴拉克总统
The White House says the president would veto the bill.
白宫称总统将否决这项议案。
2. N-COUNT 院长；校长；会长；总裁；董事长 The president of an organization is the person who has the highest position in it.  
Research and marketing operations will be Mr. Furlaud's job as president of the new company.
作为新公司的总裁，弗劳德先生将负责调研和市场运作。
...Alexandre de Merode, the president of the medical commission.
药物委员会主席亚历山大·德梅罗德



presidency
1. N-COUNT 总统职位；总裁职位；主席职位 The presidency of a country or organization is the position of being the president or the period of time during which someone is president.
Britain will support him as a candidate for the presidency of the organisation...
英国会支持他竞选这个组织的主席职位。
Poverty had declined during his presidency.
在他担任总统期间，贫困人口减少了。

希望对你有帮助。