blood group antigen was weaken

英 美
  • 血型抗原减弱
  • antigen n.[医]抗原
  • blood n.血;血统;仇恨vt.流血
  • group n.群;组;团体;集团v.聚合;成群、组;把...聚集;把...分类
  • was v.是(is,am的过去式)
  • weaken v.使...弱,削弱;变弱;弄淡