Groundwater pollution in Jinan City is mainly at shadow layer, and certain local areas of deep layer has already polluted, and with a worse tendency.是什么意思_Groundwater pollution in Jinan City is mainly at shadow layer, and certain local areas of deep layer has already polluted, and with a worse tendency.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句