primary soluble organic matter 原生可溶有机质
Upper Paleozoic primary source-rock in Fuxian exploration area is a coal system with organic matter content and maturity, higher, which is the basis of Upper Paleozoic gas reservoir.
富县探区上古生界主力烃源岩是煤系，该煤系有机质含量和成熟度均较高，是上古生界气藏的基础。
The primary pollutant of surface sediment is Organic matter.
表层沉积物主要污染因子为有机质；
But with membrane running lastingly, the organic and microorganism matter became primary reason of membrane fouling.
对运行时间较长的膜来说，有机物和微生物是造成膜污染的主要原因。
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