元素集中 (concentration of elements)是以克拉克值为比较标准的相对概念。当一元素的浓集克拉克值大于1时,则称该元素集中,其浓集克拉克值小于1时,则称该元素分散(...
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low concentration of nutrient elements 低浓度营养元素
concentration mechanism of ore elements 成矿元素聚集机制
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Instead they sprayed three elements right across the wafer, but varied the concentration of each element from one side to the other so that it contained every possible combination of them.
ECONOMIST: Combinatorial chemistry
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