名词短语
中文翻译：极限耕作边际
同义词：
['extreme limits of cultivation', 'extreme boundaries of cultivation']
例句：
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1. The research onthe extreme margin of cultivation is crucial for sustainable agriculture development.
对极限耕作边际的研究对于可持续农业发展至关重要。
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2.The farmer has to work within the extreme margin of cultivation to ensure the crop's yield.
农民必须在极限耕作边际内工作，以确保作物的产量。
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3.The extreme margin of cultivation is where the soil becomes too poor to support any crops at all.
极限耕作边际是土壤变得太贫瘠以至于根本无法种植任何作物的地方。