direct current supply

例句：

1. 1. The new power plant provides a direct current supply to the city.
   新电厂为城市提供直流供电。
2. 2.The generator converts alternating current into direct current for the electric motor.
   发电机将交流电转换为直流电，供给电动机使用。
3. 3. The battery stores direct current energy and can be used to power devices that require it.
   电池储存直流电能，可用于需要直流电的设备。