trip-wire

例句：

1. 1. The security guard had to trip the wire to stop the intruder.
   保安不得不触发机关来阻止入侵者。
2. 2.The policeman used a trip wire to catch the thief.
   警察用一个绊脚线抓住了小偷。
3. 3.The car was equipped with a trip wire that would alert the driver if someone tried to start it without permission.
   这辆车配备了一个绊脚线，如果有人未经许可启动车辆，它会警告司机。