如果一个报警器能给你那种安全感，那就值得携带。

If an alarm gives you that feeling of security, then it's worth carrying.

《柯林斯英汉双解大词典》

上火车时，观察最短的逃离路线，熟悉安全设施，比如紧急报警器和对讲机。

When boarding the train, look for your shortest escape route and familiarize yourself with safety features such as an emergency alarm or intercom.

youdao

一个好的安全公司会把报警器装在水槽上的窗户上。

A good security company alarms the window over the sink.

youdao