power supply unit

例句：

1. 1.The power supply unit is responsible for providing electricity to the building.
   电源供应单元负责向建筑物提供电力。
2. 2. The power supply unit was designed to ensure stable power supply to the facility.
   电源供应单元被设计为确保向设施提供稳定的电力供应。
3. 3. The power supply unit was installed in the basement of the building.
   电源供应单元安装在大楼的地下室。