whistle lever shaft arm key

例句：

1. 1. He whistled a tune toget the children's attention.
   他吹口哨吸引孩子们的注意。
2. 2. The oldman whistled a tune as he walkedalong the street.
   老人边走边吹口哨。
3. 3. The dog whistled at thecat as it passed by.
   狗对着猫吹口哨。