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1·Information about dietary variation among community members is derived by analyzing trace elements in human bone.

关于社区成员之间饮食变化的信息是通过分析人体骨骼中的微量元素得到的。

2·These minerals can be dated by radioactive decay techniques because of the very small quantities of radioactive trace elements they, in turn, contain.

这些矿物可以用放射性衰变技术测定年代，因为它们所含的放射性微量元素非常少。

3·Objective: Trace elements and is closely related to human health.

目的：微量元素与人体的健康密切相关。

4·Objective:To determine the contents of trace elements in hogwash oil.

目的：测定地沟油中的微量元素含量。

5·Selenium is one of the trace elements closely related to human health.

硒是与人体健康密切相关的必需微量元素之一。

6·The organic affinity of trace elements decreases further in anthracite.

到无烟煤阶段，有机态微量元素含量进一步降低。

7·The Windows are very clean and have undetectable levels of trace elements.

窗体很干净痕迹元素水平低到无法觉察。

8·It contained high levels of impurities and unsafe levels of trace elements.

它含有高浓度的杂质和不安全的各级微量元素。

9·Containing 12 vitamins, 17 amino acids and a variety of essential trace elements.

含有12种维生素、17种氨基酸和多种人体必需的微量元素。

10·More and more people have attached importance to the deficiency of trace elements.

微量元素缺乏症已经越来越多的引起人们的重视。