参考词典中particulate matter的常规释义：
基本释义
参考例句
- Pulverized particulate matter ejected by volcanic eruption.
火山灰火山爆发喷射出来的粉末状颗粒物质
英英解释
- a small discrete mass of solid or liquid matter that remains individually dispersed in gas or liquid emissions (usually considered to be an atmospheric pollutant)
[同]
particulate, particulate matter
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