轻石，浮石一种在固体状时用作研磨物且粉状时用作磨光物和研磨物的轻多孔火山岩

轻石，浮石一种在固体状时用作研磨物且粉状时用作磨光物和研磨物的轻多孔火山岩的英文翻译

基本释义

• A light, porous, glassy lava, used in solid form as an abrasive and in powdered form as a polish and an abrasive.