| 单词 | particulate matter |
| 释义 | particulate matter particulate matter n.Abbr. PM（名词）缩写 PMMaterial suspended in the air in the form of minute solid particles or liquid droplets, especially when considered as an atmospheric pollutant.粒状物质：悬浮于空气中以固体或液体微分子状存在的物质，尤指大气污染物 |
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