Video Loss Alarm, Video Motion Alarm, External Alarm.
视频丢失报警，视频移动报警，外部报警。
Low-voltage alarm, with interface connected to external emergency power supply.
低压告警，具有外接应急电电源接口。
Circadian rhythms can be affected to some degree by almost any kind of external time cue, such as the beeping of your alarm clock, the clatter of a garbage truck, or the timing of your meals.
生物钟节律在一定程度上可以受任何外界时间线索影响，如闹钟的声音清洁车的声音及进餐的定时等。
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