quality index

基本解释

Air Quality Index (AQI) measures the overall quality of the air on a scale of 0 to 500.
空气质量指数（AQI）衡量的是整个空气的质量。
On the individual level ... on certain days in winter when the air-quality index is over 150, we prohibit residential wood-burning.
冬季当空气质量指数超过一百五十的那几天，我们禁止居民燃烧木材。
With the model, the platform can also select the best input parameters of a quality index to guide the actual production.
同时该系统的模型还可以选择出对应于某个质量指标的最优输入参数，从而指导生产实际。

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