direct current

名词 direct current:

1. an electric current that flows in one direction steadily
   同义词：DC

1. A device, such as a diode, that converts alternating current to direct current.
   整流器; 整流管一种将交流电流转化为直流电流的装置，如二极管
2. A device used to convert direct current into alternating current.
   反用换流器用于变直流电为交流电的仪器