Mainly introduced the oil sand nature as well as the present oil sand distribution and the reserves, elaborated the oil sand method of exploitation and the oil sand separation method.是什么意思_Mainly introduced the oil sand nature as well as the present oil sand distribution and the reserves, elaborated the oil sand method of exploitation and the oil sand separation method.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句