名词
中文翻译：首席
同义词：
['president', 'chief executive', 'top-ranking official']
例句：
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1. The CEO is the highest-ranking official in the company.
首席执行官是公司中最高的官员。
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2. He was appointed as the first Chief of Staff to the President.
他被任命成为总统的首位幕僚长。
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3. The team's performance was considered the best among its peers, making him the Chief Achiever.
该团队的表现被认为是其同行中最好的，因此他被评为最佳成就者。