The wild benthic Marine algae include rich nutrient and trace element and active substance of biology.

野生底栖海藻含有丰富的营养，尤其是微量元素和生物活性物质。

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Current society, there is a legend about drinking water can make people lack substance of trace elements and cinema rang health, this is one of the questions in the water.

目前社会上有一种传说，担心喝纯水会使人缺物质的微量元素而影剧院响健康，这是在饮水问题上的一个误区。

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And crab meat contains trace elements, such as the substance p, therefore necessary for human body of people eat crab is good.

而且蟹肉含有丰富的微量元素，比如磷等人体所需的物质，因此吃螃蟹对人身体是有好处的。

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On the other hand they also find themselves at pains to explain that one of television's fictional devices an unequivocal match between a trace of a substance found at a crime scene and an exemplar stored in a database, whether it be fingerprints, DNA or some other kind of evidence is indeed generally just fiction.

ECONOMIST: Forensic science

The fact that humans can ingest the substance inadvertently by eating beef is putting pressure on Wada's rules, which deem the slightest trace to be a doping infringement.

BBC: Ban on clenbuterol doping drug may be relaxed