placentaladj.胎盘的；胎座的n.有胎盘哺乳动物placentan.胎盘；胎座placental membrane胎盘膜； 胎盘屏障placenta dimidiata[医] 双叶胎盘placental retention胎盘滞留placental adherence胎盘粘连placental abherence胎盘粘连placental abrnption胎盘早剥Placentae abruption胎盘早剥placental transport胎盘转运placenta marginalis有缘胎盘Placental cotyledon胎盘绒毛叶