alarm annunciator announciator siren warner
He returned to the airport to find his car alarm going off.
他回到机场时听到自己的汽车报警器响了。
—— 柯林斯例句That´s next door´s alarm.
是隔壁的报警器。
—— 柯林斯例句Who set off the fire alarm?
谁拉响了火警报警器?
—— 给力词典精选The thieves must have deliberately triggered the alarm and hidden inside the house.
盗贼肯定是故意触发了报警器,然后躲在房子里。
—— 柯林斯例句Hundreds of lives could be saved if the installation of alarms was more widespread.
如果报警器得到更广泛的安装,成百上千的生命就可能被挽救。
—— 柯林斯例句