4周搞定2000+托福核心词
用轻石磨
pumice
常考释义
Between 200 B.C and A.D 300, this was supplemented by vellum, calf skin treated and then smoothed by pumice stone.
公元前200年到公元300年之间，还增加了牛皮纸（作为书写材料）——小牛皮经过加工，用浮石将其变平整。
来源于：阅读OFFICIAL49 P2n. 浮岩；浮石
The entrance steps had been burnished with pumice.
进门的台阶用浮石磨得闪闪发亮。
Lake Taupo's shore is covered with pieces of pumice.
陶波湖岸上布满了一片片的浮石。
vt. 用浮石打磨（或摩擦）
Pumice away callouses in the bath and massage feet regularly.
沐浴时用浮石去除足部老茧，再有规律地按摩。
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