pumice
pumice — 名詞
1. a very light, soft stone formed when gas bubbles are trapped in cooling volcanic
浮石
多孔火山岩，用於去角質或拋光
a very light, soft stone formed when gas bubbles are trapped in cooling volcanic lava; it is crushed into a powder or cut into solid blocks and used for smoothing, cleaning, or polishing surfaces such as skin, stone, or wood.
Elena used a rough, lightweight pumice stone to scrub dead skin from her dry heels.
Elena 用一塊粗糙輕盈的浮石，刷掉乾燥腳跟上的死皮。
collocation: pumice stone for skincare
Jun used a pumice stone to scrub soap scum off the old bathroom tiles.
Jun 用浮石刷掉老浴室磁磚上的皂垢。
collocation: pumice stone for cleaning bathroom tile
Hassan scrubbed his greasy hands with pumice soap and a brush after fixing the car.
修好車子後，Hassan 用浮石皂和刷子搓洗油膩的雙手。
Diego rubbed a damp pumice block over his thumb callus until the skin felt smooth.
Diego 用濕的浮石摩擦拇指上的硬繭，直到皮膚變得光滑。
The potter smoothed the rough edge of the ceramic bowl with a damp pumice block.
陶藝家用濕的浮石塊磨平陶碗粗糙的邊緣。
文法句型
pumice + [verb] (material, uncountable): 'Pumice forms...'
a pumice stone / a pumice block (tool, countable)
用法筆記
When referring to the raw volcanic material, pumice is uncountable (e.g. 'a layer of pumice'). When referring to a single piece used as a grooming or cleaning tool, the countable phrase pumice stone or pumice block is more natural than 'a pumice' alone.