单词	raciology
释义	raciology noun ra·​ci·​ol·​o·​gy ˌrāsēˈäləjē plural -es : the study of human races Word History Etymology irregular from race + -o- + logy
随便看	root-hardy root-knot nematode root-mean-square root-mean-square deviation root-prune root-run rootage rootages rootbound rootbounder rootboundest rootcaps rooted rooted (for) rooted (out) rooted for rooted in rooted on rooted out rootedly rootedness rootednesses rooter rooters rootery

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