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輕石

拼音：qīng shí

英文解釋：

pumice

相關詞條：

1.pumicestone  2.lava  

中英例句：

  1. 輕石，浮石一種在固體狀時用作研磨物且粉狀時用作磨光物和研磨物的輕多孔火山岩
    A light, porous, glassy lava, used in solid form as an abrasive and in powdered form as a polish and an abrasive.

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