Powerfail: Only execute the command if init receives a power fail signal.

powerfail：只在init收到电源故障信号时执行命令。

youdao

Move to release the hand handle: Have a power fail can move to operate the garage door by hand.

手动释放手柄：停电时可以用手动操作车库门。

youdao

Proved the reliable method that t realizes power fail protection in normal cases at the same time.

同时说明了在正常情况下实现掉电保护的可靠方法。

youdao

Mr.Obama also endorsed Geithner's request for power to seize financial institutions other than banks when they fail.

VOA: standard.2009.03.24

The doctors work to clean the wound, but, as too often is the case, the lights and power fail.

CNN: Heart-rending choices in Syrian warzone hospital

Do not run a generator indoors, if your power should fail.

FORBES: Important Cold Weather Safety and Tips

Additional feeder redundancy also ensures reserve capacity to sustain power if multiple feeders fail.

FORBES: Brave New World For Big Apple's Power Grid