同根派生 humic substances相关词英汉例句Humic substances are known to coat membrane filters.腐殖质是已知能够覆盖滤膜的物质。Soil humic substance is an important natural pool of THM precursors in raw waters.土壤腐殖质是水源三卤甲烷前驱物质的重要天然来源。humic substances更多例句