名词
中文翻译：自发劳动
同义词：
['unintentional labor', 'naturallabor']
例句：
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1. The spontaneouslabor of the workers led to the completionof the project ahead of schedule.
工人们的自发劳动使项目提前完成。
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2. The spontaneouslabor of the farmers has greatly improved thequality of their crops.
农民的自发劳动大大提高了农作物的质量。
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3. The spontaneous labor ofthe students has been instrumental in promoting environmentalawareness.
学生的自发劳动在提高环保意识方面发挥了重要作用。