應該是越裏麵年份越早，靠近樹皮的越晚，每個年輪淺顏色是春夏季節長的，一條很深的線是秋冬季節長的。

來源: GraceX 於 2018-10-02 10:38:04 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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