1.用英文表达关于恐龙 的知识

Dinosaurs diverged from their archosaur ancestors approximately 230 million years ago during the Middle to Late Triassic period, roughly 20 million years after the Permian–Triassic extinction event wiped out an estimated 95% of all life on Earth.[29][30] Radiometric dating of the rock formation that contained fossils from the early dinosaur genus Eoraptor establishes its presence in the fossil record at this time. Paleontologists think that Eoraptor resembles the common ancestor of all dinosaurs;[31] if this is true, its traits suggest that the first dinosaurs were small, bipedal predators.[32] The discovery of primitive, dinosaur-like ornithodirans such as Marasuchus and Lagerpeton in Argentinian Middle Triassic strata supports this view; analysis of recovered fossils suggests that these animals were indeed small, bipedal predators.When dinosaurs appeared, terrestrial habitats were occupied by various types of archosaurs and therapsids, such as aetosaurs, cynodonts, dicynodonts, ornithosuchids, rauisuchians, and rhynchosaurs. Most of these other animals became extinct in the Triassic, in one of two events. First, at about the boundary between the Carnian and Norian faunal stages (about 215 million years ago), dicynodonts and a variety of basal archosauromorphs, including the prolacertiforms and rhynchosaurs, became extinct. This was followed by the Triassic–Jurassic extinction event (about 200 million years ago), that saw the end of most of the other groups of early archosaurs, like aetosaurs, ornithosuchids, phytosaurs, and rauisuchians. These losses left behind a land fauna of crocodylomorphs, dinosaurs, mammals, pterosaurians, and turtles.[11] The first few lines of early dinosaurs diversified through the Carnian and Norian stages of the Triassic, most likely by occupying the niches of the groups that became extinct.Dinosaur evolution after the Triassic follows changes in vegetation and the location of continents. In the Late Triassic and Early Jurassic, the continents were connected as the single landmass Pangaea, and there was a worldwide dinosaur fauna mostly composed of coelophysoid carnivores and early sauropodomorph herbivores.[33] Gymnosperm plants (particularly conifers), a potential food source, radiated in the Late Triassic. Early sauropodomorphs did not have sophisticated mechanisms for processing food in the mouth, and so must have employed other means of breaking down food farther along the digestive tract.[34] The general homogeneity of dinosaurian faunas continued into the Middle and Late Jurassic, where most localities had predators consisting of ceratosaurians, spinosauroids, and carnosaurians, and herbivores consisting of stegosaurian ornithischians and large sauropods. Examples of this include the Morrison Formation of North America and Tendaguru Beds of Tanzania. Dinosaurs in China show some differences, with specialized sinraptorid theropods and unusual, long-necked sauropods like Mamenchisaurus.[33] Ankylosaurians and ornithopods were also becoming more common, but prosauropods had become extinct. Conifers and pteridophytes were the most common plants. Sauropods, like the earlier prosauropods, were not oral processors, but ornithischians were evolving various means of dealing with food in the mouth, including potential cheek-like organs to keep food in the mouth, and jaw motions to grind food.[34] Another notable evolutionary event of the Jurassic was the appearance of true birds, descended from maniraptoran coelurosaurians.[14] By the Early Cretaceous and the ongoing breakup of Pangaea, dinosaurs were becoming strongly differentiated by landmass. The earliest part of this time saw the spread of ankylosaurians, iguanodontians, and brachiosaurids through Europe, North America, and northern Africa. These were later supplemented or replaced in Africa by large spinosaurid and carcharodontosaurid theropods, and rebbachisaurid and titanosaurian sauropods, also found in South America. In Asia, maniraptoran coelurosaurians like dromaeosaurids, troodontids, and oviraptorosaurians became the common theropods, and ankylosaurids and early ceratopsians like Psittacosaurus became important herbivores. Meanwhile, Australia was home to a fauna of basal ankylosaurians, hypsilophodonts, and iguanodontians.[33] The stegosaurians appear to have gone extinct at some point in the late Early Cretaceous or early Late Cretaceous. A major change in the Early Cretaceous, which would be amplified in the Late Cretaceous, was the evolution of flowering plants. At the same time, several groups 。

2.求有关恐龙的知识

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 from 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.。

3.关于恐龙的知识（有英文的吗）

s dominant flying vertebrate since the extinction of the pterosaurs. Avian dinosaurs have been the planet', including the ancestors of all modern birds, horns or crests. Some eat meat and some eat leaves. Many non-avian species developed elaborate skeletal modifications such as bony armor. Although generally known for the large size of some species, others quadrupedal. Some have been bipedal. Paleontologists have identified over 500 distinct genera[4] and more than 1,000 species, others carnivorous; birdsThere were a lot of kinds of dinosaurs.

Dinosaurs are a diverse and varied group of animals, birds are considered a type of dinosaur—the only group of which that has survived to the present day, in modern classification systems. Consequently,Ornithischia and plesiosaur. Some of them survived the Cretaceous–Tertiary extinction event. The fossil record indicates that birds evolved within theropod dinosaurs during the Jurassic period. The extinction of most dinosaur species occurred during the Cretaceous–Tertiary extinction event, at over 9.

Dinosaurs are a diverse group of animals that were the dominant terrestrial vertebrates for over 160 million years, most dinosaurs were human-sized or even smaller. Some dinosaurs are small. Like saurischia, and some are big, are the most diverse group of vertebrate besides perciform fish. Most groups of dinosaurs are known to have built nests and laid eggs,000 different species of non-avian dinosaurs. Dinosaurs are represented on every continent by both extant species and fossil remains, and others have been able to shift between these body postures. Some dinosaurs are or were herbivorous, from the late Triassic period (about 230 million years ago) until the end of the Cretaceous (about 65 million years ago)

4.请用英语说出恐龙的有关知识

恐龙是出现于二亿四千五百万年前，并繁荣于六千五百万年前结束的中生代爬行动物。或为恐龙和与它同一时代的蛇颈龙、翼龙等的模糊总称。恐龙在6500万年前白垩纪结束的时候突然全部消失，成为地球生物进化史上的一个谜，这个谜至今仍无人能解。地球过去的生物，均被记录在化石之中。中生代的地层中，即曾发现许多恐龙的化石。其中可以见到大量或呈现各式各样形状的骨骼。但是，在紧接着的新生代地层中，却完全看不到恐龙的化石，由此推知恐龙在中生代时一起灭绝了。恐龙种类多，体形和习性相差也大。其中个子大的，可以有几十头大象加起来那么大；小的，却跟一只鸡差不多。就食性来说，有温顺的草食者和凶暴的肉食者，还有荤素都吃的杂食性恐龙。

Dinosaurs appeared in two hundred and forty-five million years ago, sixty-five million years ago and prosperity at the end of the Mesozoic reptiles. Fuzzy general or dinosaurs, and with it the same era plesiosaurs, pterosaurs and other. The dinosaurs 65 million years ago when the end of the Cretaceous period suddenly disappeared, become a mystery to the evolutionary history of life on earth, still no one can solve this mystery. Creatures of the earth in the past, were recorded in the fossils. The Mesozoic strata, that many dinosaur fossils have been found. One can see a lot of presents every kind of shape or bones. But in the ensuing Cenozoic strata, but can not see the dinosaur fossils, and thus to infer with the extinction of the dinosaurs in the Mesozoic. Many kinds of dinosaurs, shape and habits also big difference. Which is great, there are dozens of elephants together so much; small, but with almost a chicken. On the diet, docile herbivores and ferocious carnivorous and omnivorous dinosaur, meat and vegetables to eat.