Urban Air In the 341 cities being monitored, 114 of them have attained or are better than the national standards for Grade II, accounting for 33.4%.是什么意思_Urban Air In the 341 cities being monitored, 114 of them have attained or are better than the national standards for Grade II, accounting for 33.4%.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句