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- 火警的警铃在哪？
Where's the fire alarm?
- 火警报警器响个不停。
The fire-alarm kept jangling (away).
- 火警警报响时全体人员应到楼外集合。
If the fire-alarm goes, staff should assemble outside the building.
- 昨晚我们听见了火警声。
The sound of fire-alarm was heard by us yesterday evening.
- 报警器正发出火警警报。
The fire-alarm is giving warning of fire.
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