twin cord dimity 双线凸条格细棉布
twin-cord d 双股线
twin flexible cord [电] 双股软线
flat twin tinsel cord 扁形双芯软线
The main causes of the death of one fetus in twin pregnancy were cord elements(5 cases), fetal deformity(3 cases), velamentous insertion(4 cases)and unknown etiology(15 cases).
双胎之一胎儿死亡主要原因：脐带因素5例、胎儿畸形3例、帆状胎盘4例、原因不明15例。
With the umbilical cord blood of the boy, a marrow transplant operation will be done soon and the twin girls' lives will be saved.
用宝宝的脐带血，医生将进行一次骨髓移植手术来挽救姐妹的生命。
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