umbo of tympanic membrane

例句：

1. 1. The doctor examined the patient's umbo and found no signs of infection.
   医生检查了患者的鼓膜，没有发现感染的迹象。
2. 2. The musician played a beautiful umbo piece for the audience.
   音乐家为观众演奏了一首美丽的鼓乐作品。
3. 3. The umbo of the tympanic membrane is located behind the eardrum.
   鼓膜位于耳膜后面。