septic knee

例句：

1. 1. He had a septic knee that required surgery.
   他有一个骨坏死的膝盖，需要手术。
2. 2. The patient's septic knee was treated with antibiotics.
   患者的骨坏死膝盖接受了抗生素治疗。
3. 3. The doctor advised him to avoid activities that could cause further damage to his septic knee.
   医生建议他避免可能导致他的骨坏死膝盖进一步受损的活动。