R字開(kāi)頭的單詞或詞組
roverollerretinalrushesRomeregeneraterob sb of sthrush intoreservoirrhinorecipientrevertrankingrefugeeroaringreplacementroeraidroberespondentrouterring the bellrevereROrisenrobberreflexrun freeredoregressresult inrattleround the clockrecruitmentroll aroundregulatorretirementraspberryround-the-clockrebellionrenownedrecital