英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字,中文词皆可:



安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Pterosaur - Wikipedia
    Pterosaur skeletons often show considerable fusion In the skull, the sutures between elements disappeared In some later pterosaurs, the backbone over the shoulders fused into a structure known as a notarium, which served to stiffen the torso during flight, and provide a stable support for the shoulder blade
  • Pterosaur | Flying Reptile, Fossil Order | Britannica
    Pterosaur, any of the flying reptiles that flourished during all periods (Triassic, Jurassic, and Cretaceous) of the Mesozoic Era (252 2 million to 66 million years ago) Although pterosaurs are not dinosaurs, both are archosaurs, or “ruling reptiles,” a group to which birds and crocodiles also
  • Pterosaur Facts – Amazing Flying Reptiles That Lived With Dinosaurs
    Pterosaur facts, pictures and in-depth information Flying above the heads of the dinosaurs were another group of distinctive Mesozoic Era animals – the pterosaurs These amazing prehistoric winged reptiles were the first vertebrates to fly On this page you’ll become a pterosaur expert as you find out about pterosaur evolution, the different types of pterosaur, and much more…
  • Pterosaurs: The truth about these ‘flying dinosaurs’
    Discover pterosaurs through the collections we care for – from how giant reptiles could fly to what makes pterosaurs different to dinosaurs and and why they went extinct but birds survived
  • Anatomy of pterosaurs - Wikipedia
    Life reconstruction of Pterodactylus The anatomy of pterosaurs was highly modified from their reptilian ancestors by the adaptation to flight The bones of pterosaurs were hollow and air-filled, like those of birds This provided a higher muscle attachment surface for a given skeletal weight The bone walls were often paper-thin They had a large and keeled breastbone for flight muscles and an
  • Why Aren’t Pterosaurs Dinosaurs? | Natural History Museum of Utah
    Just because pterosaurs have wings and can fly doesn’t make them closely related to birds, either For starters, birds are dinosaurs, evolving from small meat-eating (theropod) dinosaurs during the Jurassic Period — much later than flying reptiles “ [Pterosaurs] are a completely different reptile lineage from birds,” Irmis said “Also, the structure of the wing is completely
  • Pteros: The online museum of pterosaurs
    From Aerotitan to Zhenyuanopterus, Pteros illustrates all genera of the prehistoric flying reptiles known as pterosaurs
  • Pterosaur - New World Encyclopedia
    Pterosaur's hip sockets were oriented facing slightly upwards, and the head of the femur (thigh bone) was only moderately inward facing, suggesting that pterosaurs had a semi-erect stance It would have been possible to lift the thigh into a horizontal position during flight Pterosaur bones were hollow and air filled, like the bones of birds
  • Pterosaur Facts, Habitat, Size, Diet, Fossil, and Pictures
    Pterosaur belongs to an extinct group of flying reptiles that lived about 228 to 66 million years ago Even though many refer them as “flying dinosaurs,” it is a misconception because unlike dinosaurs, pterosaurs were not the descendants of the groups Ornithischia and Saurischia Suborders Pterosaur is mainly divided into two major groups, namely rhamphorhynchoidea […]
  • Pterosaurs 101 | National Geographic - YouTube
    Pterosaurs were the first vertebrates to take to the skies Learn about the anatomical features that made their flight possible, how large some of these crea





中文字典-英文字典  2005-2009