令他们惊讶的是，他们发现它爬到了后墙的火警警报器上，拉响了警报！
To their surprise, they found that it climbed over to the fire alarm on the back wall and set it off!
A：这个火警警报器好用吗？
火警警报器一响，我立刻冲出屋子。
这个火警警报器好用吗？
烟雾触发了建筑火警警报器，一名官员说道。
The smoke triggered a building fire alarm, an official said.
你知道是爱迪生发明了蜡纸、火警警报器、电池和电影吗？
Did you know Edison invented wax paper, fire alarms, the battery and motion pictures?
是火警警报器吗？
你知道是爱迪生发明了蜡纸、火警警报器、电池和电影吗？
Did you know Edison invented wax paper, fire alarms, the battery, and motion pictures?
当火警警报器响起，百货公司里的每个人都太过震惊而不知所措。
When the fire alarm went off, everyone in the department store was shocked and didn't know what to do.
我把它想象成大脑中的火警报器。
当我试用防火警报器时，声音大得使我震动。
When I tested the smoke alarm, the sound nearly knocked me off my feet.
当我试用防火警报器时，声音大得使我震动。
When I tested the smoke alarm, the sound nearly knocked me off my feet.
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