A fine, compact, usually white claylike mineral of hydrous magnesium silicate, H4Mg2Si3O10, found in the Mediterranean area and used in fashioning tobacco pipes and as a building stone.是什么意思_A fine, compact, usually white claylike mineral of hydrous magnesium silicate, H4Mg2Si3O10, found in the Mediterranean area and used in fashioning tobacco pipes and as a building stone.在线翻译_英语_读音_用法_例句