學飛的蜂鳥
蜂鳥有極強的飛行能力，它們能敏捷地上下飛、側飛、倒飛，還能原位不動地停留在花前吸食花蜜。蜂鳥翅膀扇動極快，每秒鍾達80次之多。
文章列表
(2/) 2008-11-08 18:50:22
(0/) 2008-11-08 18:48:29
(1/) 2008-05-01 20:14:09
(0/) 2008-02-29 08:02:41
(0/) 2008-02-22 08:26:52
(2/) 2008-02-16 21:27:32
(2/) 2008-01-06 10:47:58
