悬浮在空气中的固体或液体颗粒物，（不论长期或短期）因对生物和人体健康会造成危害而称之为颗粒物污染。颗粒物的种类很多，一般指0.1-75μm之间的尘粒、粉尘、雾尘、烟、化学烟雾和煤烟。其危害特点是粒径1μm以下的颗粒物尘降慢、波及面大而远。
本论文对北京市典型道路峡谷颗粒物污染模式进行了研究。
In this context, we have studied the particle's pollution mode within the typical street canyon in Beijing.
这一分析结果可为颗粒物污染的进一步研究提供基础信息和建议。
The analysis results could provide basic information and suggestion for further study on particles in the atmosphere.
结论我国北京和太原两城市颗粒物污染严重，沙尘暴爆发时更为严重。
Conclusions The air pollution of particulate matter in Taiyuan and Beijing city is very heavy, especially during dust storms.
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