An alarm bell went off.

　　警鐘響了。

　　Do you know how to deactivate the alarm?

　　你知道如何讓鬧鐘不響嗎？

　　They fitted a smoke alarm to the ceiling.

　　他們把煙霧報警器安裝在天花板上。

　　I forgot to set my alarm and I overslept.

　　我忘了上鬧鐘，所以睡過了頭。

　　The burglar alarm is activated by movement.

　　這防盜警報器一動就會響。