Aqi
abbr. 空气质量指数（Air Quality Index）
🗣️ 情景例句
OK.
好的。
Mercy to the eriminal may be eruelty to the people.
对罪犯的仁慈，就是对人民的残忍。
Most of them were able to climb out in time. However four men were not quick enough to escape the flames.
大部分工人能够及时逃生。可是有4个工人来不及逃离火场。