名词
中文翻译：Unknown
同义词：
['contaminant', 'polluter', 'polluting agent']
例句：
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1. The factory is a major source of air pollution in the area.
这家工厂是该地区主要的空气污染源。
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2.The contaminant has been found to be harmful to human health.
这种污染物被发现对人类健康有害。
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3.The polluter must take responsibility for the damage caused by their actions.
污染者必须对他们的行为造成的损害负责。