Gratification 发表于 2025-3-21 19:52:41

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驳船 发表于 2025-3-21 21:17:27

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medium 发表于 2025-3-22 04:23:47

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多骨 发表于 2025-3-22 07:27:15

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ATRIA 发表于 2025-3-22 12:30:08

Evolution of Flight,theories. According to the arboreal theory, powered flight in birds, bats and pterosaurs evolved via gliding in tree-living animals, while the cursorial theory holds that flapping flight in birds evolved in ground-running and jumping animals without a gliding intermediate.

沉着 发表于 2025-3-22 14:15:25

Concluding Remarks, we should bear in mind that animals displaying early transitional grades of the structure will seldom have survived to the present day, for they will have been supplanted by their successors, which were gradually rendered more perfect through natural selection.”

1分开 发表于 2025-3-22 18:48:44

978-3-642-83850-7Springer-Verlag Berlin Heidelberg 1990

彻底明白 发表于 2025-3-22 23:21:24

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amorphous 发表于 2025-3-23 02:32:00

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Exploit 发表于 2025-3-23 07:24:12

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查看完整版本: Titlebook: Vertebrate Flight; Mechanics, Physiolog Ulla M. Norberg Book 1990 Springer-Verlag Berlin Heidelberg 1990 Biomechanik.Verhalten.Vogelflug.Wi