动词
中文翻译：努力工作
同义词：
['work hard', 'toil', 'labor']
例句：
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1. He has been working hard to improve his English skills.
他一直在努力提高他的英语技能。
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2. The farmer worked hard all night to harvest the crops.
农民整夜辛勤工作，收割庄稼。
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3. She works hard every day to achieve her goals.
她每天努力工作，以实现她的目标。