recurrent

a.一再发生的，反复出现的

recruitment, rectal, rectangle, rectangular, rectifiable, rectification, rectifier, rectify, rectilinear, rectitude, recto, rector, rectory, rectum, recumbent, recuperate, recuperation, recuperative, recur, recurrence, recurring, recurring decimal, recusant, recycle, red, red cabbage, red card, red carpet, red corpuscle (also red blood cell), Red Crescent, Red Cross, red ensign, red flag, red giant, Red Indian (Brit redskin), red lead, red light, red meat, red pepper, red setter,