今天午餐时间踱步又见绿头鸭乱飞，贴一个旧文，十分有趣的三、四角关系，大自然真的很神奇。

来源: Sequoia_CA 于 2025-04-14 13:09:08 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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