posterior urethral valve

例句：

1. 1.The posterior urethral valve is a common cause of urinary incontinence in women.
   后尿道瓣膜是女性尿失禁的常见原因。
2. 2.The patient's posterior urethral valve was found to be stenotic.
   患者的后尿道瓣膜被发现是狭窄的。
3. 3.The posterior urethral valve is responsible for the flow of urine from the kidneys to the bladder.
   后尿道瓣膜负责将尿液从肾脏输送到膀胱。