worth the whistle

例句：

1. 1.He whistled a tune to get the children's attention.
   他吹口哨吸引孩子们的注意力。
2. 2. The policeman blew his whistle to signal the end of the race.
   警察吹响警笛示意比赛结束。
3. 3.The old man whistled as he walked along the street.
   老人边走边吹口哨。