bell button

例句：

1. 1. The bell button on the door is a symbol of safety.
   门上的铃按钮是安全的象征。
2. 2.She carefully pressed the bell button to alert the authorities.
   她小心翼翼地按响了铃按钮以通知当局。
3. 3. The bell button was designed to prevent accidents by ringing when someone touched it.
   铃按钮的设计是为了在有人触碰时发出响声以防止事故。