DC power source system

• 直流系统

DC power source system的用法和样例：

例句

1. With the transformer, the ability to transmit power at high voltage with corresponding lower current and lower line-voltage drops made ac more attractive than dc.
   变压器使得电能可以在更高电压和更低电流传输，降低了线路电压降，使交流系统比直流系统跟具吸引力。