短語詞組短語nutrient substance cycling 營養(yǎng)物質循環(huán)nutrient t cycling 養(yǎng)分循環(huán)nutrient internal cycling 養(yǎng)分內循環(huán)Nutrient cycling efficiency 養(yǎng)分循環(huán)速率nutrient bio -cycling 營養(yǎng)循環(huán)maintaining nutrient cycling 營養(yǎng)物質循環(huán)regulating nutrient cycling 調節(jié)養(yǎng)分循環(huán)nutrient cycling and balance 養(yǎng)分循環(huán)和平衡 返回 nutrient cycling