There is a complete metamorphic series of coal from lignite to meager coal in Wumuchang area,Yimin,the main metamorphism type is contact metamorphism of coal.是什么意思_There is a complete metamorphic series of coal from lignite to meager coal in Wumuchang area,Yimin,the main metamorphism type is contact metamorphism of coal.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句