单词 | humic substance |
释义 | humic substance (extremely rare) n WORD FAMILY humic substance n an organic residue of decaying organic matter Hypo|Hyper fulvic acid a yellow to yellow-brown humic substance that is soluble in water under all pH conditions humic acida dark brown humic substance that is soluble in water only at pH values greater than 2 humina black humic substance that is not soluble in water organic compound any compound of carbon and another element or a radical |
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