n.<英>江湖医生,江湖郎中,(鸭子的)呱呱声
vi.(鸭子)发出嘎嘎声
Why do intelligent people find quack remedies so appealing?
为什么聪明人会被江湖医术所吸引?
Suddenly he heard a quack.
他突然听见一声嘎嘎的叫声。
He describes himself as a doctor, but I feel he is a quack.
他自称是医生, 可是我感觉他是个江湖骗子.