名词
中文翻译：污染物
同义词：
['contaminant', 'polluting agent例句：1. The factory is heavily contaminated with toxic chemicals.（这家工厂被有毒化学物质严重污染。）']
例句：
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1. The factory is heavily contaminated with toxic chemicals.
这家工厂被有毒化学物质严重污染。
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2. The river is a source of pollution that needs to be addressed urgently.
这条河流是急需解决的污染源。
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3.The government has implemented strict regulations to reduce air pollution in the city.
政府已经实施严格的规定来减少城市空气污染。