1、I am leaving for Belling on a four-day tour
我馬上要去北京旅游4天

2、Belling out the end of the tube will permit a freer passage of air.
把管端做成鐘口狀可使氣流更暢通。

3、Belling the cat Long ago, there was a big cat in the house.
給貓戴鈴鐺很久以前，在一座房子里住著一只大貓。