黏膜皱襞

例句：

1. 1. The doctor examined the patient's throat and found a mucosal fold in the back of his throat.
   医生检查了病人的喉咙，发现他的喉咙后部有黏膜皱襞。
2. 2. The patient had to remove the mucosal fold before surgery.
   在手术前，病人必须移除黏膜皱襞。
3. 3. The mucosal folds are responsible for protecting the delicate tissues inside the mouth.
   黏膜皱襞负责保护口腔内敏感组织。