1.
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。
2.
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
3.
Research on Data Mining and Visualization of Urban Ambient Air Quality;
城市环境空气质量数据挖掘与可视化的研究
4.
Analysis of environmental air quality trends and driving factors of mining cities in central Liaoning
辽中地区矿业城市环境空气质量变化及其影响因素分析
5.
Fuzzy comprehensive evaluation on environmental atmosphere qualityin Zhengzhou Urbanization
郑州市城区环境空气质量的模糊综合评价
6.
Environmental atmosphere quality of grey forecasting in the city of Zhengzhou before 2005
郑州市城区2005年前环境空气质量的灰色预测
7.
The Status on Atmosphere Quality of Nanyang City and the Solution;
南阳市城区环境空气质量现状及对策研究
8.
Analysis and Comprehensive Evaluation of Ambient Air Quality of Kunming City in Recent Eight Years
昆明市城区近8年来环境空气质量分析与综合评价
9.
COMPREHENSIVE ASSESSMENT ON AIR QUALITY OF URBAN ROAD ENVIRONMENT BASED ON IMPROVED GRAY-CLUSTERING METHOD
基于改进灰色聚类法的城市道路环境空气质量综合评价
10.
Air Quality Analysis of 2006 to 2007 in Tieling
铁岭市2006～2007年环境空气质量状况分析
11.
Comparison Study on Air Quality in Major Cities of China;
我国主要城市大气环境质量对比分析
12.
ambient air quality standard
GB3095-1996环境空气质量标准
13.
The Study of Air Environment Capacity and Time Limit Satisfying Project in Lhasa City;
拉萨市大气环境容量及环境空气质量限期达标方案研究
14.
Analysis on Relation of Air Quality and Meteorological Condition in Nanjing
南京市环境空气质量与气象条件的关系分析
15.
In 2001, the annual average of NO2 concentration in the air of 341 cities attained the Grade II national standards for air quality.
2001年，341个城市空气中二氧化氮浓度年均值均达到国家环境空气质量二级标准。
16.
Influence of Dust Storms on Urban Atmospheric Environmental Quality in Northern China
沙尘天气对我国北方城市大气环境质量的影响
17.
Study on characteristics of atmospheric environmental quality in urban fringe of Wuhu
芜湖市城市边缘区大气环境质量特征研究
18.
The air quality in the urban areas picked up gradually.
城市空气质量逐步提高。