严重喉气管狭窄、闭锁或合并气管大面积缺损以双蒂肌皮瓣、复合肋软骨和人工气管环重建术效果较好；
Reconstruction with combined bipedicled myocutaneous flap and costal cartilage or artificial materials are better for severe laryngotracheal stenosis and large tracheal defect.
此外，卵母细胞中核仁周围出现染色质环是否代表最终成熟或闭锁前的一个步骤还不清楚。
Besides, it is not known whether the perinucleolar ring in an oocyte represents a step toward final maturation or atresia.
此外，卵母细胞中核仁周围出现染色质环是否代表最终成熟或闭锁前的一个步骤还不清楚。
Besides, it is not known whether the perinucleolar ring in an oocyte represents a step toward final maturation or atresia.
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