Pollution source means a physical or chemical operating unit that emits air pollutants.
指排放空气污染物之物理或化学操作单元。
"Residents near the lake have showed support for the closure of chemical companies, the major source of pollution, because this concerns the livelihood of our offspring," he said.
他说湖边的居民已经表示出对湖边最主要的污染源—化学工厂的关闭，因为这直接关注湖里生物的繁衍。
The fact that copper pollution of laccaic acid in stick lac could not be avoided was concluded after considering its biological source and chemical nature.
从紫胶的生物来源和紫胶红色素的化学本质分析，紫胶原胶中紫胶红色素的铜污染是不可避免的。
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