2 sentences for 报警 (bào​jǐng — alarm)

1. 这台机器装有自动报警系统。

   zhè tái jī​qì zhuāng​yǒu zì​dòng bào​jǐng xì​tǒng.

   This machine is equipped with an automatic alarm system.

   Source: Dong Chinese Dictionary

2. 一旦发现漏水，系统会自动报警。

   yī​dàn fā​xiàn lòu​shuǐ, xì​tǒng huì zì​dòng bào​jǐng.

   The system will automatically sound an alarm if a leak is detected.

   Source: Dong Chinese Dictionary