musculus levator labii inferioris

例句：

1. 1. The doctor performed surgery on the patient's lower jaw to correct his cleft palate.
   医生对患者的下颚进行了手术，以纠正他的腭裂。
2. 2. During sleep, the muscles of the lower jaw relax, allowing for easy swallowing.
   在睡眠时，下颌肌肉放松，使吞咽变得容易。
3. 3. The patient was advised to exercise regularly to strengthen the musculus levator labii inferioris and improve facial expression.
   患者被建议定期锻炼，以增强下颌提肌的力量并改善面部表情。