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subsonic    
a. 比音速稍慢的,次音速的

比音速稍慢的,次音速的


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英文字典中文字典相关资料:


  • Types of Dinosaurs - American Museum of Natural History
    Learn how many species have been discovered, and see photos and information about over 40 types of dinosaurs
  • Dinosaur Facts - American Museum of Natural History
    Those clues to what dinosaurs were like are found in fossils—the ancient remains of an organism, such as teeth, bone, or shell—or evidence of animal activity, such as footprints and trackways Everything we know about non-avian dinosaurs is based on fossils, which include bones, teeth, footprints, tracks, eggs, and skin impressions
  • Dinosaurs - American Museum of Natural History
    Learn about dinosaurs at the Museum: facts, photos, games for kids, lesson plans for educators, and more
  • Paleontology for Kids: OLogy | AMNH
    Visit OLogy, the Museum's science website for kids, to find free dinosaur games and activities Learn how to draw what a dinosaur looked like, match eight dinosaur fossil photos with their descriptions, reconstruct and identify a fossil skeleton, and much more!
  • Dinosaurs: Ancient Fossils, New Discoveries Exhibition | AMNH
    Dinosaurs: Ancient Fossils, New Discoveries is organized by the American Museum of Natural History, New York (www amnh org), in collaboration with the Houston Museum of Natural Science; the California Academy of Sciences, San Francisco; The Field Museum, Chicago; and the North Carolina Museum of Natural Sciences, Raleigh
  • Dinosaur Exhibits | American Museum of Natural History
    The fourth floor halls of the Museum feature approximately 100 dinosaur specimens, a tiny fraction of the largest collection of dinosaur fossils in the world
  • Tyrannosaurus rex Fossil | American Museum of Natural History
    Learn more about the famous mega-predator Tyrannosaurus rex This famous fossil is shown in a stalking position: head low, tail extended, one foot slightly raised
  • Dinosaur Bones: Learning from Fossils | AMNH
    The most common fossils are bones and teeth, but fossils of footprints and skin impressions exist as well Fossils are excavated from many environments, including ancient riverbeds and lakes, caves, volcanic ash falls, and tar pits Fossils are classified as either body fossils or trace fossils
  • Dinosaurs and Fossils | AMNH
    NOVACEK: What keeps us coming back are these incredible fossils: dinosaurs, but also sites where the animals were actually preserved brooding on their nests, and lots of mammals, and lizards, and everything else [Two researchers confer at a fossil site in the Gobi ]
  • How to find dinosaur fossils | American Museum of Natural History
    Look behind the scenes at how dinosaur fossils are found by real paleontologists! Dr Aki Watanabe explains the steps scientists use to make dino discoveries





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