单词：humus acid
humus acid的用法和样例：
例句
- This paper describes the principles and methods of extracting humic acid product from lignite.摘要论述了褐煤中提取腐殖酸产品的方法及原理。
- Humus was added into nonorganic silt to clarify the effect of a variety of additives on the cemented soil performance.在去除有机质的黏质粉土中加入腐殖酸，研究了经某种液态添加剂改良后的水泥土特性。
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