perineal muscles

例句：

1. 1.The doctor advised him to exercise regularly to strengthen his perineal muscles.
   医生建议他定期锻炼以加强会阴肌肉。
2. 2.During childbirth, the perineal muscles are stretched and weakened.
   分娩时，会阴肌肉会被拉伸并减弱。
3. 3.The patient was advised to avoid lifting heavy objects while her perineal muscles were weak.
   患者被建议在会阴肌肉虚弱时避免举重物品。