/?p?m.?s ?sto?n/apieceofpumiceused forrubbingthings to make themsmooth:浮石,轻石(用来摩擦物体使其光滑)You can use apumicestonein thebathtoremovedryskinfromyourfeet.你洗澡时可以用浮石去除脚上干燥的死皮。librakv/iStock/Getty Images Plus/GettyImagesSMART Vocabulary: related words and phrasesGeology: types of rock
arenaceous
arenite
asthenosphere
asthenospheric
basaltic
borax
chalk
emery
feldspar
flint
lahar
limestone
magma
marcasite
marl
marmoreal
metamorphic
pumice
scour
soapstone
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Making things more or less smooth or straight(Definition ofpumice stonefrom theCambridge Advanced Learner's Dictionary & Thesaurus? Cambridge University Press)#https://dictionary.cambridge.org//dictionary/english/pumice-stone##