火灾警报用英语可以表示为 "fire alarm"。这个短语来源于消防报警系统，当探测器检测到火灾时，它会发出声音和/或视觉警报，以提醒人们疏散。
下面是一些使用 "fire alarm" 的例句：
The fire alarm went off and everyone had to evacuate the building. (火灾警报响了，所有人都必须疏散大楼。)
Please do not ignore the fire alarm. If you hear it, you should immediately leave the building. (请不要忽略火灾警报。如果你听到了，你应该立即离开大楼。)
The fire alarm system is designed to alert people of a fire and to help them evacuate safely. (火灾警报系统旨在提醒人们有火灾并帮助他们安全疏散。)
下面是一些使用 "fire alarm" 的例句：
The fire alarm went off and everyone had to evacuate the building. (火灾警报响了，所有人都必须疏散大楼。)
Please do not ignore the fire alarm. If you hear it, you should immediately leave the building. (请不要忽略火灾警报。如果你听到了，你应该立即离开大楼。)
The fire alarm system is designed to alert people of a fire and to help them evacuate safely. (火灾警报系统旨在提醒人们有火灾并帮助他们安全疏散。)