atresia [eɪt'ri:zɪr]

例句:

• Most ovarian follicles undergo an involutional process called follicular atresia.
  大多数卵泡都经过退化变为闭锁卵泡.
  
• If a baby with tricuspid atresia doesn't have an atrial septal defect, the baby may need a procedure to create this opening.
  来自CNN
• Biliary atresia is a rare disease in which the tubes which drain liquid bile from the liver are progressively destroyed.
  来自BBC
• Surgical Treatment of Congenital Atresia of External Auditory Meatus ( Analysis of 13 ears )
  先天性外耳道闭锁的外科治疗 ( 附13耳分析 )
  
• Objective To explore the surgical treatment of congenital choanal atresia ( CCA ) .
  目的探讨先天性后鼻孔 闭锁 的手术时机和手术方式.