noun 下载 🔗分享 白云母 A pale brown mineral of the mica group, being a basic potassium aluminosilicate with the chemical formula KAl2(Si3Al)O10(OH,F)2; used as an electrical insulator etc. Examples : "The electrical components in the old radio were insulated with thin sheets of muscovite. " 旧收音机里的电子元件是用薄薄的白云母片绝缘的。 mineral material geology substance science 与AI对话词汇游戏阅读练习