Aqi
abbr. 空气质量指数（Air Quality Index）
🗣️ 情景例句
Years of work went into these pictures.
多年心血换来这些照片。
There is a crook(=affliction,trial) in the lot of every one.
人生总有倒楣事；人生总有不如意处。
Oh, that's not necessary.
啊，不必这样。