關(guān)于恐龍的英文介紹ppt演示

1、,,dinosaur,,Hello,everybody, Iˊm very glad to stand here to talk something with you ,then today Iˊd like to share my topic about dinosaurs……,dinosaur,As you can see,the dinosaurs introuduced now is real dinosaurs ,not li

2、ke this……O__O”…,What is a Dinosaur?,Dinosaurs are a class of animals which lived about 6500 million years ago ,and it can support the body upright , the control of global terrestrial ecosystems over 100 million years. Mo

3、st dinosaurs have become extinct. but the descendants of dinosaurs - birds, survive and reproduce so far.,恐龍是生活在距今大約6500萬年前的、能支撐身體直立行走的的一類動物，支配全球陸地生態(tài)系統(tǒng)超過1億年。大部分恐龍已經(jīng)滅絕，但是恐龍的后代——鳥類存活下來，并繁衍至今。,As is known to us all,there ar

4、e varieties of dinosaurs long long ago such as Carnivorous dinosaur, Stegosaurus and so on.,These dinosaurs walked on two feet. They had thick, dome-shaped skulls. Scientists think they may have used their thick heads to

5、 butt other dinosaurs,腫頭龍是用兩條腿走路的，它們有很細(xì)的，圓頂形的頭骨，科學(xué)家認(rèn)為它們有可能是用它們細(xì)小的頭部去頂撞其他恐龍的。,PACHYCEPHALOSAURS,腫頭龍,STEGOSAURS,劍龍,These ornithischians walked on four legs and had a row of bony plates down their back. Stegosaurus, a large

6、 stegosaur, also had spikes on its tail. It used its spiked tail for fighting off meat-eating theropods. Stegosaurus was about 30 feet (9 meters) long.,這些鳥臀目恐龍用它的四條腿走路，而且它們的背上有一排骨板，劍龍，大的劍龍，在它的尾巴上有那種板釘狀的東西，它經(jīng)常用它那帶有板釘?shù)奈舶腿ズ?/p>

7、獸腳亞目食肉恐龍戰(zhàn)斗，劍龍是大約30英尺（9米）長。,Oviraptor,偷蛋龍,The oviraptorids are a theropod group in which the skull and mandible are highly modified.Oviraptorids are characterized by a short snout,the absence of teeth,a tall mandible,a lo

8、ng pa-rietal,an enlarged tooth-like process on the palate,and a large,anteriorly located external man-dibular fenestra,偷蛋龍是一種獸腳亞目食肉恐龍，它的頭部和下顎骨都是改進(jìn)過的，偷蛋龍的特點(diǎn)就是有很短的吻部，缺損的牙齒，壯實(shí)的下顎骨，還有一個長長的頂和一個擴(kuò)充的像牙齒一樣的東西，一個大的，前面的位于下頜外部的孔,The

9、 extinction of dinosaurs,Thought dinosaurs once were the overlord of the word ,they died out finally.With regard to the reasons for the extinction of dinosaurs, it is still being studied. For a long time, the most autho

10、ritative view, and the extinction of the dinosaurs 6500 years ago about a large meteorite. According to the study, there was a 7-10 km in diameter asteroid will fall on the earth's surface, causing a large explosion,

11、 such as throwing a lot of dust in the atmosphere to form the Zhetianbiri House of Sand and Fog, led to the suspension of plant photosynthesis , And therefore the extinction of the dinosaurs.,The extinction of dinosaurs,

12、In addition,there is some other opinions ,such as climate change, said the species, said the fight and continental drift, said… After all,the dinosaurs have extincted…Nowadays our human beings life is going on a