quack-quack

例句：

1. 2.
   动物
2. 3.
   声音
3. 4.
   声音
4. 5.
   声音
5. 6.
   声音
6. 7.
   声音
7. 8.
   声音
8. 9.
   声音
9. 10.
   声音
10. 1. The ducks were quacking loudly in the pond.
    鸭子们在池塘里呱呱叫。
11. 2. The baby was making a lot of noise, quacking and crying.
    婴儿在不停地吵闹，呱呱叫和哭。
12. 3. The traffic was so noisy that it made us all quack at each other.
    交通噪音太大了，让我们都互相抱怨。