| 释义 |
fire alarm
noun countable
■(the switch connected to) a device such as a bell or siren that warns the people in a building that the building is on fire 火警警报器，火警钟；火警警报器开关•If the fire alarm goes off (= starts making a sound) , leave the building calmly.如果火警警报器响了，请保持镇定，离开大楼。 |