B1 also doorbell an electrical device that makes a ringing sound when you press a button(电)门铃
B2 a hollow metal object shaped like a cup that makes a ringing sound when hit by something hard, especially a clapper钟;铃
More examples
The children arrived at school just as the bell was ringing.
At the sound of the alarm bell, the customers all ran wildly for the doors.
I rang the bell but nobody came to the door.
In the square the church bells chimed.
After their wedding the bells pealed out from the tower.
noun¹
often
noun²
both often
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