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养分循环 yǎngfèn xúnhuán
food.serv.	ciclo nutritivo
养分循环 一个生物地球化学的循环，其中无机养分转移到土壤、生物体、空气和水，或通过其中的一些。 yǎngfèn xúnhuán
environ.	ciclo dei nutrienti