labial fold

例句：

1. 1. She noticed a small labial fold on his cheek.
   她注意到他脸颊上有一个小唇褶。
2. 2. The doctor examined the patient's labial folds for any signs of infection.
   医生检查了病人的唇褶，以寻找任何感染的迹象。
3. 3. During the performance, the dancer made use of labial folds to create a dramatic effect.
   在表演中，舞者利用唇褶创造出戏剧性的效果。