placental tissue短语¹⁴⁴⁹⁷²⁺² 基本例句 胎盘组织 The cause of it were mostly retained placental tissue or membranes, sub involution of uterus, puerperal infection, uterine incision infection and dehiscence of cesarean section following. 出血原因主要是胎盘胎膜残留，其次是子宫复旧不良，产褥期感染，子宫切口感染、裂开。 cnki