英语词典
in the northern qinling mountains there are three igneous rock series: a, b and c series, corresponding to the mantle-derived, the mantle-derived magma contaminated by crust materials, and the crust-mantle mixing genesis types.
北秦岭存在A、B、C三类火山岩系列，对应着幔源型、壳幔混染型和壳幔混合型成因类型。
互联网摘选
Study on heavy metals in soil contaminated by coal waste rock pile
矿区煤矸石堆放引起土壤重金属污染研究
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