枫中落叶
英式英语音标：[kwæk]
美式英语音标：[kwæk]
动词：（鸭子）发出嘎嘎声
1. I went everywhere for treatment, tried all sorts of quacks.
2. Why do intelligent people find quack remedies so appealing
3. There were ducks quacking on the lawn.
4.He went to see a quack who said he could cure him with some kind of strange herbs.
5.Have you seen your quack about that cough?
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