该文是关于腐植物质研究的综述性文章。
This paper is a general review on humic substances research.
他们认为腐植物料是从腐烂的植物体浸沥而来。
They believe that the humic materials are leached from decaying plant materials.
从沉积物中萃取腐植物是研究工作者遇到的第一个问题。
Extraction of humic substances from sediments is often the first task that confronts the investigator.
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