air contaminant是什么意思 air contaminant怎么读
air contaminant的用法和样例
- The oxidants are the most annoying of all the air pollutants.
氧化剂是所有空气污染物中最讨厌的。 - At any time the macrophage system might be injured by viral infection or air pollutant exposure.
巨噬细胞随时都可能受病毒感染或空气污染物所损伤。
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