這個問題很有意思，從鳥的翅膀結構角度來說。能不能勞駕貼個翅膀尖的局部大圖，看看那個斷層到底是怎麽回事？

來源: 還是沒筆名於 2012-03-04 14:42:45 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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