The security cameras and alarm system were alerted and the police immediately came to the house and arrested the intruder who was attempting to break a window when they arrived.
监控摄像头和保安系统立刻发出警报，警方立刻赶到现场，逮捕了这一试图通过打破窗户进入家中的男子。
He invented an electronic instrument that gives an alarm when an intruder comes in.
他发明的电子仪器能在有人闯入时发出警报声。
When an intruder attempts to gain access, an alarm condition is triggered that alerts security personnel and indicates where the incident took place.
当入侵者企图进入，警报条件就会被触发，从而提醒保安人员并指出其事发地点。
When an intruder attempts to gain access, an alarm condition is triggered that alerts security personnel and indicates where the incident took place.
当入侵者企图进入，警报条件就会被触发，从而提醒保安人员并指出其事发地点。
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