The Precambrian banded iron formation (BIF) is one of the most important iron ore deposit type in our Country, whose reserves, orefield and output all hold the first place.是什么意思_The Precambrian banded iron formation (BIF) is one of the most important iron ore deposit type in our Country, whose reserves, orefield and output all hold the first place.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句