介词短语
中文翻译：在
同义词：
['at the forefront of', 'at the top of', 'at the front of']
例句：
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1. The team wasawarded the championship at the head of the league.
该队荣获联赛冠军，位于榜首。
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2.The new policy will be implemented at the head of the government.
新政策将由政府高层推行。
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3. The research project is at the top of the agenda.
该项目是议程的首位。