emergency alarm bell

例句：

1. 1. The emergency alarm bell woke us up in the middle of the night.
   紧急报警钟在半夜把我们叫醒了。
2. 2. The fire department used the emergency alarm bell to alert the public.
   消防部门使用紧急报警钟来警告公众。
3. 3. The elderly man was so frightened by the sound of the emergency alarm bell that he ran out of the house.
   那位老人被紧急报警钟的声音吓得跑出了房子。