词根词缀:rar-, rare-
【来源及含义】Latin: rarus, rare, thin, loose, sparse; airy, porous, infrequent, unusual
【同源单词】bone rarefaction, rare, rare species, rare, rare-earth alloy, rare-earth elements
【来源及含义】Latin: rarus, rare, thin, loose, sparse; airy, porous, infrequent, unusual
【同源单词】bone rarefaction, rare, rare species, rare, rare-earth alloy, rare-earth elements