The study proved that the major harmful material in tailing water was Mo and Cd.

研究证明尾砂水中所含有害物质主要是钼与镉。

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The fume hood is the main safety in lab. In order to control harmful material leakage and keep the experiment working properly, the face velocity must be controlled efficiently.

通风柜是实验室中主要的安全设备，为了控制有害物质的外溢和保证实验正常进行，必须有效地控制罩面风速。

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Radiation used in CT scans may be harmful to the genetic material within mummified remains.

VOA: special.2010.06.29

The Conference recommended that governments consider regulations to ensure that harmful material, especially to children, was not freely available on cable.

UNESCO: Education

Analysis of the dust material over the weekend indicated that it does not contain material that is seriously harmful to health.

BBC: Britain's Mara Yamauchi arrives in London for Marathon

The internet watchdog was set up by the government in 2008 to teach children about web dangers, target harmful net content and establish a code of conduct for sites featuring material uploaded by users.

BBC: Peers urge online bullying clampdown