将“pollutant"翻译成中文

External environmental causes of cancer are factors in the environment such as pollutants that increase risk for cancer.

外部环境致癌因素是指环境中的污染物等导致罹患癌症的危险升高的因素。

It reported that some scientists think there is a link between the air pollutants contained in vehicle exhaust and dying forests.

该期杂志报道,有些科学家认为,汽车排气管喷出的污染物质跟森林日益枯槁不无关系。