Dexing Copper Mine in Jiangxi province is the biggest open-pit non-ferrous metal mine in China,and it is a porphyry copper deposit.是什么意思_Dexing Copper Mine in Jiangxi province is the biggest open-pit non-ferrous metal mine in China,and it is a porphyry copper deposit.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句