动词短语
中文翻译：在
同义词：
['work on', 'work with', 'work toward']
例句：
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1. She works at her job everyday.
她每天努力工作。
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2. Theteam worked at developing anew software program.
团队努力开发一个新的软件程序。
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3. They are working atimproving their skills in the field.
他们正在努力提高他们在该领域的技能。