名词
中文翻译：劳动
同义词：
['work', 'effort', 'exertion']
例句：
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1. The farmer has been working hard on the farm all day.
农民整天都在农场辛勤工作。
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2. She labored for hours to finish the project.
她辛苦工作了几个小时来完成这个项目。
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3. Labor is essential for the growth of a nation.
劳动对于一个国家的成长至关重要。