internal urethral orifice

例句：

1. 1.The doctor found a small internal urethral orifice that was causing the infection.
   医生发现一个小的尿道内开口导致了感染。
2. 2. He was able to identify the internal urethral orifice and perform the necessary treatment.
   他能够识别出尿道内开口并执行必要的治疗。
3. 3.The patient's condition improved significantly after the internal urethral orifice was repaired.
   患者的病情在修复尿道内开口后显著改善。