Nine point percent of the cities have serious noise pollution, 16.5% of them have medium level pollution, 48.7% have light pollution and 25.3% of the cities have fairly good ambient sound environment concerning the urban road traffic.是什么意思_Nine point percent of the cities have serious noise pollution, 16.5% of them have medium level pollution, 48.7% have light pollution and 25.3% of the cities have fairly good ambient sound environment concerning the urban road traffic.在线翻译_英语_读音_用法_例句