auricular gangrene

例句：

1. 1. He developed a severe case of mastoiditis after the surgery.
   手术后他患上了严重的中耳炎。
2. 2. The patient's condition worsened rapidly, requiring immediate medical attention.
   患者的病情迅速恶化，需要立即医疗救治。
3. 3. The doctor advised him to avoid loud noises and wear ear protection for his recovery.
   医生建议他在康复期间避免大声噪音，并戴上耳塞。