Home/rubstonerubstone/ruhb-stohn/US // ˈrʌbˌstoʊn //UK // (ˈrʌbˌstəʊn) //砾石,碎石,砾岩,搓衣板Definitionsn.名词 noun1: a stone, especially a whetstone, used for polishing or sharpening.Level 4Browse all words →