Hong Kong belongs to the Pearl River Delta airshed, in which between 80% - 95% of the total tonnage of emissions are from sources across the border.是什么意思_Hong Kong belongs to the Pearl River Delta airshed, in which between 80% - 95% of the total tonnage of emissions are from sources across the border.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句