exhaust air pollution standards

例句：

1. 1. Theexhaust air pollution standards are set to bestricter than before.
   排气污染标准将比之前更加严格。
2. 2. The factory has beenfined for exceeding the exhaust airpollution standards.
   该工厂因超标排放废气而被罚款。
3. 3. The city is working on improvingits exhaust air pollution standards to reduce airpollution.
   该市正在努力提高其排气污染标准以减少空气污染。