结果：重庆市各主要交通干道尾气污染物浓度均超过国家环境卫生标准。

Results: the exhaust pollutant in the main roads in Chongqing exceed the national environmental health standard.

youdao

结果：重庆市各主要交通干道尾气污染物浓度均超过国家环境卫生标准。

Results: the exhaust pollutant in the main roads in Chongqing exceed the national environmental health standard.

youdao