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.
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。
3.
From 2002 to 2004, the quality of ambient air in urban area of Qinzhou city reach national secondary standard.
2002年至2004年，钦州市区环境空气质量达国家二级标准。
4.
d emission standard
空气质量和排放标准
5.
ambient air quality standard
GB3095-1996环境空气质量标准
6.
Haikou has attained Grade I while 14 of them attained Grade III.
其中海口达到一级标准。 14个城市空气质量为三级。
7.
We present the National Primary and Second Ambient Air Quality Standards as upper bound guideline.
我们把国家一级和二级环境大气质量标准作为上限控制线。
8.
The Elementary Exploration on the Standard of Air Quality in Spun Yarn Workshops of Cotton Mills;
棉纺织厂细纱车间空气质量标准初探
9.
Clean Air Act Amendment (1987) established a national air-quality standard for ozone.
1987年洁净空气法修正案建立了空气的国家空气质量标准。
10.
The quality control of secondary hematology analyzer and application
二级标准血液分析仪的质量控制与应用
11.
judging on a scale of 1 to 10.
质量标准分为10个等级。
12.
The cities exceeding national Grade III standards account for 9.7%, with 2% lower than the previous.
其中超过国家空气质量三级标准的城市占统计城市的9.7%，比上年度降低2个百分点。
13.
As we saw in Chapter 3, air in Class I areas must be kept cleaner than would otherwise be required by the national air quality standards.
像我们在第三章所看到的那样，一级地区的空气标准比国家空气质量标准所要求的还要高出许多。
14.
As to the air quality, the number of days with air quality recorded above Grade II totalled299 last year, two days less than that of the previous year.
在空气质量方面，全年空气质量等级达到二级以上的天数为299天，比前年减少两天。
15.
That provides for the implementation, maintenance, and enforcement of the national air quality standards.
它为贯彻、维护、并执行国家的空气质量标准作准备。
16.
Air quality standard and calculation method of designed ventilation rate in underground vehicle passages
地下机动车道空气质量标准和设计通风量计算方法
17.
Article23 The design, construction and quality of civil air defense works must conform to the protection and quality standards established by the State.
第二十三条人民防空工程建设的设计、工、量必须符合国家规定的防护标准和质量标准。
18.
Standard for quality inspection and evaluation of petroleum construction engineering Electrical engineering(overhead power lines engineering)
石油建设工程质量检验评定标准电气工程（架空电力线路工程）