coefficient of haze

例句：

1. 1.The city's air quality has significantly improved since the implementation of stricter regulations.
   自从实施了更严格的规定以来，该市的空气质量已经显著改善。
2. 2. The coefficient of haze is a critical indicator for assessing air pollution levels.
   雾霾系数是评估空气污染水平的关键指标。
3. 3. To reduce the impact of haze, governments have implemented various measures to control emissions.
   为了减少雾霾的影响，政府采取了各种措施来控制排放。