呼号

例句：

1. 1. The policemen were shouting for help.
   警察在大声呼救。
2. 2.He called me from the other side ofthe street.
   他从街的另一边给我打电话。
3. 3.They hailed a taxi and went tothe hospital.
   他们拦了一辆出租车去医院。