The observation by SEM and analysisshow that the morphology of the char particles may be divided into four types and it is relat-ed with the maceral and the rank.是什么意思_The observation by SEM and analysisshow that the morphology of the char particles may be divided into four types and it is relat-ed with the maceral and the rank.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句