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一个盲人背着一个瘸子赶路。突然,瘸子大叫:“沟!沟!沟!”盲人听到后,立即答复:“啊嘞啊
A blind man hops a lame. Suddenly, the lame shouted: “ditch! Ditch! Ditch!” After hearing the blind, immediately reply: "ah ah ah