名词
中文翻译：兼任
同义词：
['concurrently', 'jointly', 'concurrently']
例句：
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1. He is a professor and also works as a researcher.
他是一名教授，同时也是一名研究员。
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2. They are both excellent teachers and also good friends.
他们都是优秀的老师，也是好朋友。
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3. The company has two CEOs, one for the day-to-day operations and another for strategic planning.
这家公司有两个首席执行官，一个负责日常运营，另一个负责战略规划。