环境污染

huán jìng wū rǎn duì rén lèi zào chéng wēi xié

环境污染对人类造成威胁。

Environmental pollution poses a threat to the race.

zhè shì yī zhǒng huán jìng wū rǎn wù

这是一种环境污染物。

This is a kind of environmental contaminant.

yǐn qǐ jí bìng de wài yīn bāo kuò huán jìng wū rǎn

引起疾病的外因包括环境污染。

External factors in the production of disease include pollution of the environment.