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你参考一下吧Dinosaurs are a diverse group of animals that were the dominant terrestrial vertebrates for over 160 million years, from the late Triassic period (about 230 million years ago) until the end of the Cretaceous (about 65 million years ago). The extinction of most dinosaur species occurred during the Cretaceous–Tertiary extinction event. The fossil record indicates that birds evolved within theropod dinosaurs during the Jurassic period. Some of them survived the Cretaceous–Tertiary extinction event, including the ancestors of all modern birds. Consequently, in modern classification systems, birds are considered a type of dinosaur—the only group of which that has survived to the present day. 不够的话，Dinosaurs are a diverse and varied group of animals; birds, at over 9,000 species, are the most diverse group of vertebrate besides perciform fish. Paleontologists have identified over 500 distinct genera and more than 1,000 different species of non-avian dinosaurs. Dinosaurs are represented on every continent by both extant species and fossil remains. Some dinosaurs are or were herbivorous, others carnivorous. Some have been bipedal, others quadrupedal, and others have been able to shift between these body postures. Many non-avian species developed elaborate skeletal modifications such as bony armor, horns or crests. Avian dinosaurs have been the planet's dominant flying vertebrate since the extinction of the pterosaurs. Although generally known for the large size of some species, most dinosaurs were human-sized or even smaller. Most groups of dinosaurs are known to have built nests and laid eggs.
jessica-qn
1、encyclopaedia:a reference work (often in several volumes) containing articles on various topics (often arranged in alphabetical order) dealing with the entire range of human knowledge or with some particular specialty2、dinosaur:any of numerous extinct terrestrial reptiles of the Mesozoic era3、harmless:not causing or capable of causing harm4、skeleton:the hard structure (bones and cartilages) that provides a frame for the body of an animal5、footprint:a trace suggesting that something was once present or felt or otherwise important肉食性恐龙：Carnivorous dinosaur are a group of aggressive reptiles that has strong hind legs and heavy head. They feed on meats from other dinosaurs and becausd that they were overweighted,they moved not as quickly as other species of dinosaus did.植食性恐龙：With long neck and tail, titanosauridaes are very heavy and enormous. They were feed on grass,leaves and bushes.飞行恐龙：Flying dinosaurs were the ancestors of birds and they were the first kind of animals that has wings covered with feather.陆生恐龙：Land dinosaurs family had the largest amount of member and were usually enormous in shapes. Most of them were good at running and they lived around the world.
城阳高升移门
恐龙与其它爬行动物的最大区别在于它们的站立姿态和行进方式，恐龙具有全然直立的姿态，其四肢构建在其体躯的正下方位置。这样的架构要比其他种类的爬行动物（如鳄类其四肢向外伸展），在走路和奔跑上更为有利。根据恐龙腰带的构造特征不同，可以划分为两大类：蜥臀目（Saurischia）和鸟臀目(Ornithischia)。 二者区别在于其腰带结构： 蜥臀目的腰带从侧面看是三射型，耻骨在肠骨下方向前延伸，坐骨则向后延伸，这样的结构与蜥蜴相似；鸟臀目的腰带，肠骨前后都大大扩张，耻骨前侧有一个大的前耻骨突，伸在肠骨的下方，后侧更是大大延伸与坐骨平行伸向肠骨前下方。因此，骨盆从侧面看是四射型。不论是蜥臀目还是鸟臀目，它们的腰带在肠骨、坐骨、耻骨之间留下了一个小孔，这个孔在其它各个目的爬行动物中是没有的。正是这个孔表明，与所有其它各个目的爬行动物相比，被称为恐龙的这两个目之间有着最近的亲缘关系。 Dinosaurs and other reptiles, the biggest difference is their standing posture and moving way, the dinosaur has a completely upright posture, the limbs of its body is built just below the position. This architecture than other types of reptiles (such as crocodiles whose limbs stretched out), walking and running is more favorable. According to the structural characteristics of different dinosaurs belt can be divided into two categories: Saurischia (Saurischia) and Ornithischia (Ornithischia). Distinguish between the two belts in its structure: the purpose of lizard hip belt from the side is a three-launched, the pubic bone below the extended forward in the intestine, while the ischium extended backward, so similar to the structure and lizards; birds hip belt purposes, before and after iliac have greatly expanded anterior pubis before a big pubic sudden, stretched out below the ilium, the back is greatly extended and stretched parallel to the ischium below the iliac ago. Therefore, the pelvis from the side is a great success type. Or whether Saurischia Ornithischia their belts in the ilium, ischium, pubis, a small hole between the left, this hole all purposes in other reptiles is not. It is this hole that all purposes with all other reptiles than dinosaurs known between these two objectives has recently related.
小泥格格
恐龙的英文介绍是：
1、英文介绍：
Dinosaur refers to the recent common ancestor and all descendants of Triceratops, modern birds and Lianglong. For the convenience of research, dinosaurs can be divided into birds and non birds dinosaurs.
Among them, non bird dinosaurs only lived in the Mesozoic and became extinct 65 million years ago. This entry mainly introduces non bird dinosaurs.
Vigorous limbs, long tail and huge body are the portrayal of some non bird dinosaurs. They mainly inhabit in the forest or open areas of the lake shore plain.
2、中文翻译：
恐龙，是指三角龙，现代鸟类和梁龙最近的共同祖先及其所有后代。为方便研究，恐龙可分为鸟类和非鸟恐龙。其中，非鸟恐龙只生活在中生代，已于6500万年前全部灭绝。
而本词条主要介绍非鸟恐龙。矫健的四肢、长长的尾巴和庞大的身躯是部分非鸟恐龙的写照。它们主要栖息于湖岸平原的森林地或开阔地带。
外形特征：
大部分的恐龙要比大型蜥脚类恐龙还小得多。现有的证据表明，恐龙的平均大小在三叠纪、早侏罗纪、晚侏罗纪和白垩纪都不断变化。
大部分兽脚类恐龙的体重在100到1000公斤之间，而全新世的掠食性肉食动物则多半在10到100公斤之间。恐龙的体重估计值，大多介于1到10吨之间。伦敦国立自然历史博物馆的一个研究指出恐龙的体重平均值约在100公斤左右，而新生代的哺乳类体重平均值多在2到5公斤之间。
以上内容参考 百度百科—恐龙
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