Studies of Historical Data Concerning Exploitation of Silver (Lead)-Zinc Deposits in Yunnan Province and Some Opinions on Further Mineral Exploration是什么意思_Studies of Historical Data Concerning Exploitation of Silver (Lead)-Zinc Deposits in Yunnan Province and Some Opinions on Further Mineral Exploration在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句