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- 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
- 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%25。
- Air quality grade 空气质量等级
- Indoor air quality can be improved efficiently. 可以有效提高室内空气品质。
- Ever wonder how good the air quality is today? 有想过今天的空气有多清新吗?
- Air quality is still within acceptable standards. 空气质素仍符合可接受标准。
- What's the air quality in your place? 你们那里的空气质量怎么样?
- Revise Air Quality Objective now! 请支持修订空气质素指标!
- We are monitoring the air quality. 我们在监测空气质量。
- The particulate remains the key pollutant affecting the air quality in China. The annual concentration of the urban particulate in 64.1% of the cities exceeded Grade II. 颗粒物仍是影响我国城市空气质量的主要污染物，64.;1%25的城市颗粒物年均浓度超过国家空气质量二级标准。
- 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。
- The air quality has deteriorated these past few days. 前几天空气质量已下降。
- 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。
- The air quality in the urban areas picked up gradually. 城市空气质量逐步提高。
- The air quality in ten cities such as Haikou,Sanya and Zhaoqing attained Grade I,while the air quality in 114 of them was at Grade III,accounting for 33.4%. 其中海口、三亚、肇庆等10个城市空气质量达到一级标准。114个城市空气质量为三级，占统计城市数的33.;4%25。
- 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。
- The air quality in the city is worse than the countryside. 城市里的空气质量不如乡下。
- Air quality in Hong Kong is typical of any large modern city. 香港的空气质素与其他现代化大都市相若。
- To monitor light, pollution, air quality and traffic flow. 监测公路上的照明、污染、空气质量和车流量。
- Hon Audrey EU raised a question on indoor air quality. 余若薇议员就室内空气质素提出质询。
