世界气象组织的科学家对地面臭氧、烟雾、空气悬浮微粒子、二氧化硫、一氧化碳之类的污染物质进行评估监测。
WMO scientists assess and monitor air pollutants such as ground-level ozone, smog, particulate matter, sulfur dioxide and carbon monoxide.
基于平均质量的概念，提出了粒子计数器测量悬浮颗粒物质量浓度的计算模型。
A model for measuring aerosol mass concentration by an optical particle counter is presented using the conception of the average mass.
基于平均质量的概念，提出了粒子计数器测量悬浮颗粒物质量浓度的计算模型。
A model for measuring aerosol mass concentration by an optical particle counter is presented using the conception of the average mass.
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