| 释义 |
NAAQSCOCA⁵⁷³³⁴BNC¹⁴⁴⁶⁶⁴⁺³
基本例句
n.全国环境空气质量标准
In2004,210 cities exceeded the Class 2 limit values of the National Ambient Air Quality Standard NAAQS within the total342 monitored cities.
2004年，受监测的342个城市中有210个城市的空气质量超过了国家环境空气质量标准的二级标准。 cleanairinitiative.org
NAAQS National Ambient Air Quality Standards define attainment and protect human health by setting a limit on SO2 concentration nationwide.
国家环境空气质量标准规定了全国的二氧化硫浓度限值来保护人民健康。 cleanairnet
CO exceeds the NAAQS in heavy traffic urban areas;
城市交通拥堵地区 CO超标； cleanairinitiative.org |