题目内容：

[英语谜语]What is the difference between a duck?
这个谜语的答案是什么意思哇
看了答案~还是很纠结~唔~
Q: What is the difference between a duck?
A: ★One of its legs are both the same.★
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（What is the difference between an apple那个问题明白了,鸭子这个就…嗯*

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