竭尽

例句：

1. 1. The engine is exhausted after running for hours.
   发动机运行了几个小时后已经耗尽。
2. 2. The firefighters were exhausted after fighting the fire for hours.
   消防员在扑灭大火几小时后已经筋疲力尽。
3. 3. The old man was exhausted from his long walk.
   老人因为长时间的步行而精疲力尽。