短语词组短语Brownout Detect 掉电检测Brownout Voltage 电压保护brownout t 节约用电ac brownout 交流降压;交流节电power brownout 限电brownout mode 节电模式sleep for brownout 休眠省电brownout and high efficiency 节电高效UPS on battery Brownout 持续低电压 返回 brownout