bellmouth

例句：

1. 1.The bellmouth of the old clock was a thing of beauty.
   旧时钟的钟舌是件美丽的东西。
2. 2. He whistled a tune to get her attention.
   他吹口哨吸引她的注意。
3. 3. The sound of the bellmouth echoed through the hall.
   铃口的声音在大厅里回荡。