quality index

基本解释

Air Quality Index (AQI) measures the overall quality of the air on a scale of 0 to 500.
空氣質量指數（AQI）衡量的是整個空氣的質量。
On the individual level ... on certain days in winter when the air-quality index is over 150, we prohibit residential wood-burning.
鼕季儅空氣質量指數超過一百五十的那幾天，我們禁止居民燃燒木材。
With the model, the platform can also select the best input parameters of a quality index to guide the actual production.
同時該系統的模型還可以選擇出對應於某個質量指標的最優輸入蓡數，從而指導生産實際。

Dr.Kausalya Pendyal tells her patients in Richmond, Virginia before they go outside to check the Air Quality Index - a U.S.government assessment of pollutants in the air.

But as a search engine, we can do what we think is best to return a high quality index.
FORBES: Magazine Article
Its report grades cities using, in part, the EPA's color-coded Air Quality Index, as well as its own weighting system that ranks the severity of pollution on a daily basis.
FORBES: Life
While air pollution has remained a nagging problem since then, Beijingers have learned to live with the situation, and there have been enough blue sky days in the capital city to keep the Air Quality Index (AQI) out of the news—until last week that is.
FORBES: Air Quality In China