估計要 75 歲，乘以一點五。

來源: 紫色王家於 2011-03-01 14:09:16 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

古時 50 歲算長壽了，那時知識量比現在小得多

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估計要 75 歲，乘以 一點五。