C power supply

例句：

1. 1. Thenew power supply system has greatly improved theefficiency of our factory.
   新的电源供应系统大大提高了我们工厂的效率。
2. 2. Thepower supply company promised toprovide us with a stable andreliable power supply.
   供电公司承诺为我们提供稳定可靠的电源供应。
3. 3. Thepower supply problem is oneof the most urgent issues facingour country's development.
   电源供应问题是我国发展中面临的最紧迫的问题之一。