quack /kwæk/ ( quacking, quacked, quacks )

• 1. 

  V-I When a duck quacks, it makes the noise that ducks typically make. (鸭子)发出嘎嘎声

  例：

  There were ducks quacking on the lawn.

  有鸭子在草坪上发出嘎嘎的叫着。

• 2. 

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

  例：

  Suddenly he heard a quack.

  突然，他听到嘎的一声。

• 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. 庸医; 江湖医生 [oft N n] [表不满]

  例：

  I went everywhere for treatment, tried all sorts of quacks.

  我为求医走遍了每一寸土地，尝试了所有江湖医生的疗法。

• 4. 

  ADJ Quack remedies or quack cures are medical treatments that you think are unlikely to work because they are not scientific. 江湖疗法的 [ADJ n] [表不满]

• 5. 

  V to act in the manner of a quack 以庸医之道行医