air parity

例句：

1. 1. The air parity in this region is very important for the health of the people.
   该地区的空气平衡对人们的健康至关重要。
2. 2.The scientists are trying to find a way to improve the air parity in the city.
   科学家们正在尝试找到一种方法来改善城市的空气质量。
3. 3. The government has implemented several policies to reduce air pollution and improve air parity.
   政府已经实施了多项政策，以减少空气污染并提高空气质量。