quack

鸭叫声、嘎嘎声

We heard a loud quack coming from behind the reeds.

我们听到芦苇后面传来一声响亮的鸭叫声。

庸医、蒙古大夫、密医贬义

That so-called doctor is a quack selling useless pills.

那个所谓的医生是个庸医，卖的都是没用的药丸。

冒牌货、招摇撞骗者

He turned out to be a quack with no real qualifications.

结果他是个冒牌货，根本没有真正的资格。

嘎嘎叫

The ducks quacked loudly whenever someone approached the pond.

每次有人走近池塘，鸭子就大声嘎嘎叫。

冒牌的、骗人的

She wasted a fortune on quack remedies for her back pain.

她为了背痛，在骗人的偏方上花了一大笔钱。