| 词汇 | pumice | 
| 释义 | pumice  noun [ U ] uk/ˈpʌm.ɪs/ us  浮石,轻石(用来摩擦物体使其光滑) a type of grey, light stone that is used in pieces or as a powder for rubbing things to make them smooth  Pumice is produced in volcanic eruptions. 浮石是在火山爆发中产生的。  | 
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