sphincter of urethra

例句：

1. 1. The sphincterof urethra is responsible forcontrolling the flow of urine.
   尿道括约肌负责控制尿液的流动。
2. 2. During sexualintercourse, the sphincterof urethra helps to preventleakage of semen.
   在性交过程中，尿道括约肌有助于防止精液泄漏。
3. 3.Injuries to the sphincter of urethra can leadto difficulty urinating and pain duringsexual activity.
   尿道括约肌受伤可能导致排尿困难和性行为时疼痛。