The extent of ree enrichment and differentiation is affected by ree concentrations and distributions in the primary granitoid rocks, weathering degree, etc.

REE在风化壳中富集分异受风化壳发育程度、花岗岩原岩中ree含量及其分布和分配的影响。

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Through the system analysis, it announced APM's character, elements enrichment degree and style of pollutant source of the two sampling sites in Liangxiang of Beijng.

通过对两个地点多组样品的系统分析，揭示了北京良乡两采样点的APM特征、元素富集程度以及两地污染源类型。

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At present, the research of the enrichment rule of oil, coal and uranium has reached an extensive and deep degree in the Ordos basin.

目前对鄂尔多斯盆地油气、煤和砂岩型铀矿各自富集规律的研究与认识都已达到一定的深度和广度。

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