The project succeeded in screening 346 sites with potential chemical contamination risks and identifying 58 priority pollution sources for follow-up mitigation actions.

通过对346个具有潜在化学污染风险的点进行筛查，这一全球环境基金项目识别出58个重点污染源作为采取后续措施的重点。

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In library, the contaminations can be divided into four parts: i. e. chemical contamination, physical contamination, biological contamination and radioactive contamination.

前言： 图书馆内污染物按性质分为化学性污染物、物理性污染物、 生物性污染物和放射性污染物。

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Product in registered establishments is sometimes exposed to chemical contamination as a result of an accident in the plant, such as a fire, ammonia leak, or burst hydraulic line.

有时工厂中的事故如火灾、氨水泄漏或爆裂的水管会导致注册场所中的产品接触到化学污染物。

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Early tests don't show substantial chemical contamination, but monitoring might have to continue for decades.

VOA: standard.2010.05.27

Many others died later of cancer and other illnesses, and the legacy of chemical contamination persists.

BBC: Iraqi Kurds mark 25 years since Halabja gas attack

John Sullivan of the Boston Water and Sewer Commission testified that since September 11 the nation's drinking water utilities have been on a heightened state of alert to protect against the potential disruption of water service and biological or chemical contamination of drinking water.

CNN: FBI: 'No specific, credible threats' to drinking water

Some scientists have proposed adding chemical tracers to fracking fluids as a way of confirming that any contamination of drinking water comes from the drilling process.

BBC: Fracking: Untangling fact from fiction