battery backup的用法和樣例：
例句
- Three-phase UPS systems are used in most large data centers for power conditioning and battery back-up in the event of mains power failure.
當數據中心一旦發生主電源掉電的時候，三相不間斷電源系統是應用最廣泛的後備電池和供電條件。 - Switch between working battery and spare battery is fulfilled by using magnetic latching relay.This method effectively lowers the power dissipation.
後備電池的切換採用磁保持繼電器，有效地解決了在線偵測和低功耗的技術難點。
辭彙搭配
- back up (因積聚而)擁堵...
