noun [专属名词]（鸭子的）呱呱声，嘎嘎声；庸医，江湖郎中；<非正式>医生
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
verb [vi. 不及物动词]（鸭子）呱呱叫，嘎嘎叫；<非正式>大声说蠢话，咭咭呱呱
There were ducks quacking on the lawn.
有鸭子在草坪上发出嘎嘎的叫着。
单词造句: