| 单词 | 研磨物 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔pumice〕A light, porous, glassy lava, used in solid form as an abrasive and in powdered form as a polish and an abrasive.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美国传统〔shagreen〕The rough hide of a shark or ray, covered with numerous bony denticles and used as an abrasive and as leather.鲨革：鲨鱼或鲂鱼的粗糙的外皮，覆有许多骨状小齿，用作研磨物和皮革美国传统 |
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