李约瑟如果在16xx年代到不丹亲自见过两百年前修建的铁索桥，就不会犯他说的那种错误。

来源: 咲媱于 2026-02-02 07:02:03 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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