如果地球（海）是平的，遠處的帆船應該船身和船帆應該同時會看見，如果是球行，自然船帆首先被看見

來源: 一劍無痕於 2024-02-21 20:24:23 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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