self-sustained discharge

例句：

1. 1. The deviceis designed to self-sustain its own power supply.
   该设备设计为自我维持其自身的电源供应。
2. 2. The researcher found that the self-sustained discharge of the battery was a significant factor in its lifespan.
   研究者发现，电池的自我维持放电是其寿命的一个重要因素。
3. 3. In the event of an emergency, the self-sustained discharge system can provide a safe alternative for evacuation.
   在紧急情况下，自持系统可以提供一种安全的撤离替代方案。