hadrosaurs信息详情
n.[古生]鸭嘴龙（一种长有鸭嘴的恐龙）
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chadron state college───查德隆州立学院
hadrosaurus───n.鸭嘴龙
19 species assinged to 10 genera belonged 7 families. They are assosiated with Hadrosaurs, Tyrannosaurs, Sauropods, Charophytes, Sporopollen and trace fossils et al.───7科、10属、19种之多，且与霸王龙、鸭咀龙、蜥脚类及轮藻、孢粉、痕迹化石等共生。
surprise, they found that only one group suffered from cancer-the hadrosaurs, or "duck-billed" dinosaurs. 29 benign tumors were found in the tail bones of 97 animals.───惊奇的是，仅有一组恐龙是癌症的受害者——它就是鸭嘴龙。研究人员在97个恐龙的尾骨里发现了29个良性肿瘤块。
But there was a problem with this finding: fossils show no evidence that hadrosaurs could hop.───但是发现中还存在一个问题：鸭嘴龙化石中并没有找到表明它可以跳跃的证据。
The result, Manning said, implies that scientists may have been underestimating the size of hadrosaurs and other dinosaurs.───最后，曼宁说，意味着科学家可能已低估了鸭嘴龙和其他恐龙的大小。
"For millions of years, until their extinction at the end of the Cretaceous, duck-billed dinosaurs, or hadrosaurs, were the world's dominant herbivores, " Purnell said.
Many hadrosaurs in other parts of the world had head ornamentations, or crests , but Edmontosaurus did not.