從延安到外蒙的直線距離大概在1300公裏，加上中間還有不少敵占區，全撤過去還真不容易，赫赫。

來源: richman 於 2015-12-20 22:47:46 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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