名词
中文翻译：劳动
同义词：
['labor', 'effort', 'toil', 'exertion']
例句：
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1. The workers are putting in extra hours to complete the project on time.
工人们加班加点以确保项目按时完成。
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2. He put in a lot of effort into his studies and achieved good results.
他努力学习并取得了好成绩。
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3. She exerted all her energy to help the injured person get back on his feet.
她尽其所能帮助受伤的人重新站起来。