常見(jiàn)例句雙語(yǔ)例句There is a fear of cord prolapse, a complication where the umbilical cord precedes the child through the birth canal.臍帶脫垂是一種分娩時(shí)的竝發(fā)癥，臍帶可能搶在胎兒出來(lái)前脫離産道。 返回 umbilical canal