anterior fold of tympanic membrane

例句：

1. 1.The doctor examined the patient's anterior fold of the tympanic membrane.
   医生检查了患者的鼓膜前褶。
2. 2.The anterior fold of the tympanic membrane is a crucial part of hearing.
   鼓膜前褶是听力的关键部分。
3. 3. The patient's condition worsened after the surgery, and the doctor had to re-examine the anterior fold of the tympanic membrane.
   手术后，患者的病情恶化，医生不得不重新检查鼓膜前褶。