rindexrubstone./ruhb-stohn/US // ˈrʌbˌstoʊn //UK // (ˈrʌbˌstəʊn) //砾石,碎石,砾岩,搓衣板Definitionsn.noun · 名词1.›a stone, especially a whetstone, used for polishing or sharpening.Level 4More words in r →