不能說鄭和的航海技術先進於西方。鄭和需要在海岸可視範圍航行，而西人早在希臘羅馬時代就可以遠航了。

來源: borisg 於 2026-02-22 19:16:54 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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