估计要 75 岁，乘以一点五。

来源: 紫色王家于 2011-03-01 14:09:16 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

古时 50 岁算长寿了，那时知识量比现在小得多

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估计要 75 岁，乘以 一点五。