pumice stone

剑桥词典

a piece of pumice used for rubbing things to make them smooth
浮石，轻石（用来摩擦物体使其光滑）
You can use a pumice stone in the bath to remove dry skin from your feet . 你洗澡时可以用浮石去除脚上干燥的死皮。 返回 pumice stone