daily average maximum concentration

例句：

1. 1.The daily average maximum concentration of pollutants in the river is a concern for environmentalists.
   河流中污染物的日平均最大浓度是环保人士关注的问题。
2. 2.The study found that the daily average maximum concentration of carbon dioxide was higher than the previous year.
   研究发现，二氧化碳的日平均最大浓度高于去年。
3. 3. The government has set a target to reduce the daily average maximum concentration of air pollution by 20% within ten years.
   政府设定了目标，在未来十年内将空气污染的日平均最大浓度降低20%。