北下在這裏更精確。北上不是因為地圖吧？我認為是因為大體上北方地勢高於南方。

來源: QualityWithoutName 於 2021-11-12 20:18:05 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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