dioxathion

例句：

1. 1.The air quality in the city is significantly worse than that in the countryside.
   城市的空气质量明显比农村差。
2. 2. The farmers used to rely on natural fertilizers, but now they have to use synthetic chemicals.
   农民过去依赖天然肥料，但现在不得不使用合成化学品。
3. 3. The government has been working hard to reduce the amount of pollutants in the air.
   政府一直在努力减少空气中的污染物。