1.
The air quality in the urban areas picked up gradually.
城市空气质量逐步提高。
2.
Urban Air Quality in Key Environmental Protection Cities In the 47 key environmental protection cities, 19 of them have attained the Grade II standards for urban air quality.
环保重点城市空气质量47个环保重点城市中，19个城市环境空气质量达到空气质量二级标准。
3.
Effects of meteorological conditions on air quality in Jinjiang,Fujian province
气象条件对晋江城市空气质量的影响
4.
Compared with the previous year, the urban air quality remains unchanged.
与上年相比，城市空气质量基本持平。
5.
The air quality in 113 was worse than Grade III, accounting for 33.2%.
113个城市空气质量劣于三级，占统计城市数的33.2%。
6.
Effects on Beijing air quality brought by countryside winter heating
北京市农村住宅采暖对城市空气质量的影响
7.
Percentage of the Air Quality Grades in 341 Cities in 2001
2001年度全国341个城市空气质量分级比例
8.
City Air Quality Forecast Model and Software Development Research;
城市空气质量预报模型及软件开发研究
9.
Characteristics of Air Quality and Preventing and Curing Countermeasures of Air Pollution in Cities of Henan Province;
河南省城市空气质量特征与污染防治对策
10.
Comparative Study on Air Quality of Several Cities in the Yangtze River Delta;
长江三角洲部分城市空气质量对比研究
11.
Influence of precipitation on air quality in several cities,China
降水对中国部分城市空气质量的影响分析
12.
Variations and Affecting Factors of Urban Air Quality in Fujian Province
福建省城市空气质量变化趋势及影响因素分析
13.
Preliminary study on urban air quality pollution potential statistical forecast method in Jinjiang,Fujian province
晋江城市空气质量污染潜势统计预报方法初探
14.
Study on the City Ambient Air Quality and the Assessment Methods;
城市环境空气质量及其评价方法研究
15.
Regulating Energy Structure in a City to Improve the Air Quality in the District;
调整城市能源结构 改善区域空气质量
16.
Effects of High Chimney Emission on Air Quality in the Urban Area;
城市高架点源对空气质量的影响分析
17.
Investigations on the Air Quality Near Buildings in the Urban Sub-domain
城市街区建筑物附近空气质量的研究
18.
Analysis of influence factors for indoor air quality in Shanghai
上海城市室内空气质量影响因素分析