alarm systems

The new office building has a state-of-the-art alarm system that detects both smoke and intrusion.

新办公楼配备了一套先进的报警系统，既能检测烟雾也能检测入侵。

She forgot to activate the alarm system before leaving the house.

她离开房子前忘记启动报警系统了。

Many homeowners install an alarm system to protect their property.

许多房主安装报警系统来保护他们的财产。