bell key

例句：

1. 1. The bell key was the only thing that could open the door.
   铃铛钥匙是唯一能打开门的东西。
2. 2. The bell key was used to unlock the door.
   铃铛钥匙用来锁门。
3. 3. The bell key was a symbol of authority and power.
   铃铛钥匙象征着权威和权力。