关于恐龙灭绝的知料用英语过去式写出来吧!

关于恐龙灭绝的知料用英语过去式写出来吧!

The Earth's history has been 45 billion years.Constraints in the 38 million years ago before the emergence of the earliest organisms.Since then,much of the planet has experienced the rise of biotechnology,the course of the decline until extinction,only the fossils so far retained.Now the world can be found in various periods of different types of fossils,these fossils tell the history of our planet earth-shaking changes.
Dating back more than 200 million years ago,life on Earth has a group of organisms - the dinosaurs.They are very popular and dominate the Earth to reach 1.5 million years old.
In humans before the advent of dinosaurs had become extinct,and no one to see live dinosaurs.Today,we know everything about dinosaurs from the dinosaur fossils come.As people found their bones,teeth,egg fossils,and skin marks,footprints,and other cave sites,the scientists on the basis of these clues to discover the secrets of the dinosaurs.
翻译：
地球的历史已经四百五十〇点零亿年.约束在38万年前最早的生物出现前.自那时以来,地球上的很多经历了生物技术的兴起,减少直至灭绝的过程中,只有化石至今保留.现在,全世界可以在不同类型的化石发现不同时期,这些化石告诉我们这个星球的地球历史翻天覆地的变化.
早在200多万年前,地球上生命的生物群体 - 恐龙.他们非常受欢迎,主宰地球将达到150万岁.
在人类前恐龙灭绝的来临已经成为,也没有人看到活恐龙.今天,我们知道从恐龙化石恐龙的一切来.当人们发现他们的骨头,牙齿,蛋化石,皮肤标志,足迹和其他洞穴遗址,对这些线索的基础上,科学家发现了恐龙的秘密.
累了我一天才完成的!