tragus

例句：

1. 1. He had a tragus injury that required surgery.
   他有一个需要手术的胸骨伤。
2. 2.The doctor examined the patient's tragus and found no signs of infection.
   医生检查了患者的胸骨，没有发现感染的迹象。
3. 3.The tragus is an important part of the human body that supports the heart.
   胸骨是人体的一个重要部分，支撑着心脏。