兩人成行，三人成伍。兩個人並排走，三個，及三個以上成一路縱隊。而且都要有一個領隊的。

來源: 信筆由墨於 2023-04-29 16:45:37 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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