单词	hardpan
释义	hard·pan (härdpăn′) n. 1. A layer of hard subsoil or clay. Also called caliche. 2. Hard, unbroken ground. 3. A foundation; bedrock.
随便看	perimeter perimetric perimetrical perimetrically perimorph perimorphic perimorphism perimorphous perimysium perinatal perinatally perinatology perineal perinephral perinephrial perinephric perinephrium perineum perineurial perineurium period periodic periodic acid periodical periodical cicada

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