1、
The essential trace mineral, selenium, is of great importance on human health.
硒是人体必需的微量矿物质, 对健康有着极其重要的作用.
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You can trace every sickness every disease, and every ailment to a mineral deficiency.
“我们可以追溯任何的疾病 、 症状与病痛的起因自矿物质的缺乏”.
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5、
The determination of trace concentrations of mercury in mineral materials is described.
文章叙述矿物中痕量汞的测定.
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