R字開(kāi)頭的單詞或詞組
rip currentrationaleRORomerhinoroveregeneraterollerrush intoretinalrushesrob sb of sthrecipientrevertroaringroereplacementrouterrobereflexrevereraidrefugeerespondentrisenrobberring the bellrattlerun freerecruitmentredoregressresult inround the clockregulatorretirementrenownedroll aroundraspberryrebellionrecitalribbon