recovery occurs without treatment

例句：

1. 1.The patient is recovering well from the surgery.
   病人从手术中恢复得很好。
2. 2.After the accident, the car was in a state of recovery.
   事故后，汽车处于恢复状态。
3. 3.Recovery time varies depending on the severity of the injury.
   恢复时间取决于受伤的严重程度。