通过煤质特征、 矿物学和元素的组相关性分析，概括了引起这两种类型煤常量和微量元素之间差弄的地质原因。
Through analyses of relativity on coal quality and mineralogy and elements, summarized geological reasons caused differences between norm al and trace elements in the two types of coal.
矿泉水不仅含有人体必需的常量元素，而且含有各种对人体有益的矿物质和微量元素。
Mineral water contains not only common elements necessary to human body, but also all kinds of minerals and trace elements which are good for human health.
本文报道1986～1987年对252例正常妊娠孕妇及其新生儿进行了头发和血清9种微量元素和常量元素的测定。
Between December 1986 and December 1987, the determinations of nine kinds: of trace and common elements in hair and serum of 252 normal pregnant women and their infants are reported.
结果表明，原产地土壤与母岩的微量元素和常量元素在含量变化上呈现趋势一致性；
The results showed that the origin of trace elements in soil and rock elements, and constant changes in the content presented on trends in consistency;
结果表明，原产地土壤与母岩的微量元素和常量元素在含量变化上呈现趋势一致性；
The results showed that the origin of trace elements in soil and rock elements, and constant changes in the content presented on trends in consistency;
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