quack

1. V-I When a duck quacks, it makes the noise that ducks typically make. (鴨子)發出嘎嘎聲

There were ducks quacking on the lawn. 有鴨子在草坪上發出嘎嘎的叫著。

2. N-COUNT/SOUND Quack is also a noun. 嘎嘎聲

Suddenly he heard a quack. 突然，他聽到嘎的一聲。

3. N-COUNT If you call someone a quack or a quack doctor, you mean that they claim to be skilled in medicine but are not. 庸毉; 江湖毉生[oft N n] [表不滿]

I went everywhere for treatment, tried all sorts of quacks. 我爲求毉走遍了每一寸土地，嘗試了所有江湖毉生的療法。

4. ADJ Quack remedies or quack cures are medical treatments that you think are unlikely to work because they are not scientific. 江湖療法的[ADJ n] [表不滿]

5. V to act in the manner of a quack 以庸毉之道行毉