备用电源

1.backupsupply  2.reservepowersupply  3.stand-bypower  4.emergencypowersupply  5.reservesupply  

备用的英语翻译：

【计】 preemergency; stand-by; stand-by application
【经】 stand by

电源的英语翻译：

electrical source; power source; power supply
【计】 power source; power supply; PS; supply power
【化】 current source; electric source; power source; power supply
supply source