“咚咚！”

        “咚咚咚”

        “咚咚！”

        这敲打声，好像有点和规律啊！

        “咚咚咚”

        “咚咚！”

        “咚咚咚”

        “咚咚！”

        这貌似是，三长两短啊！

        外面的敲打声还在继续，我匆忙回应。

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