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                quack的复数形式为:quacks... 
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                quack的现在进行时为:quacking... 
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                ...quack doctors charming money out of the pockets of credulous health-hungry citizens.从那些渴望健康而又容易上当受骗的市民那里骗钱的江湖郎中Suddenly he heard a quack.他突然听见一声嘎嘎的叫声。For the rest it was just a noise, a quack - quack - quacking.除此之外,便... 
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                quack的一般过去时为:quacked... 
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                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.... 
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                n.江湖医生,江湖郎中,(鸭子的)呱呱声vi.(鸭子)发出嘎嘎声... 
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                quack的音标:quack的英式发音音标为:[kwæk]quack的美式发音音标为:[kwæk]... 
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                quack的现在完成时为:quacked...