Coal ash is known to contain dangerous elements including arsenic, lead, and selenium, yet the TVA refused at first to issue any health warnings about contamination from the spill.

煤灰渣含有多种危险物质，包括砷、铅、硒等，然而田纳西流域管理局起先矢口否认煤灰渣中含有对健康有害的物质。

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Ploughing, and some fertilisers can help farmers reduce plants' uptake of the dangerous elements, and binding agents can be added to animal feed to reduce their uptake from the gut, he added.

他补充说，犁田，以及一些化肥可以帮助农民减少植物吸收危险的元素，粘合剂可以添加到动物饲料中以减小其从肠道吸收。

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Objective To analyze phenomena of the accumulation of dangerous elements in insulin resistance and diabetic diseases of middle-aged bald male patients of Han nationality, and their relationship.

目的研究中年男性秃顶人群中胰岛素抵抗与糖尿病危险因素聚集的关系。

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The governing group contained both moderate and extremist elements, but was considered dangerous by U.S.authorities.

VOA: standard.2009.09.16

Yet, in parts of Iraq desperate and dangerous elements remain.

CNN: U.S., Iraqi leaders confer on nation's future

In an interview with the BBC, Musharraf warned that a "disturbed environment" might bring in dangerous elements that could pose a risk to Pakistan's control over its nuclear arsenal.

NPR: Negroponte Urges Musharraf to End Emergency

Ploughing, and some fertilisers can help farmers reduce plants' uptake of the dangerous elements, and binding agents can be added to animal feed to reduce their uptake from the gut, he added.

BBC: Fukushima fallout fears over Japan farms