closed amputation

例句：

1. 1. The patient underwent a closed amputation to save his life.
   患者接受了闭合截肢手术以挽救生命。
2. 2. The operation was performed with the patient under general anesthesia.
   手术在患者全身麻醉下进行。
3. 3. The closed amputation was successful, and the patient made a full recovery.
   闭合截肢手术成功，患者完全康复。