名词
中文翻译：任职
同义词：
['tenure', 'tenure of office']
例句：
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1.The president's incumbency is expected to last until the next election.
总统的任期预计将持续到下一次选举。
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2.The company's CEO has been incumbent for over a decade.
该公司的首席执行官已经担任了十多年。
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3. During his incumbency, he made significant contributions to the country's development.
在他任职期间，他为该国的发展做出了重大贡献。