shutdown signal

例句：

1. 1. The shutdown signal was triggered by a faulty circuit.
   一个故障电路触发了关闭信号。
2. 2. During the power outage, we used the shutdown signal to turn off all the lights.
   停电期间，我们使用关闭信号来关闭所有的灯。
3. 3. The engineers monitored the shutdown signal as they worked on fixing the issue.
   工程师们在修理问题时监控着关闭信号。