flip the first b over and then we will get a d.

来源: sportwoman 于 2012-06-20 21:08:46 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (29 bytes)
回答: 现学现卖：回头率=bouble take 由 WayCool 于 2012-06-20 20:46:32

Should it be "double"?

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