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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.
例句
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。