恐龙是生活在距今大约2亿3500万年至6500万年前的、能以后肢支撑身体直立行走的的一类动物,支配全球陆地生态系统超过1亿6千万年之久.大部分恐龙已经灭绝,但是恐龙的后代——鸟类存活下来,并繁衍至今.恐龙”一词在字典中意思：一类生活在几亿年以前的古动物,现已灭绝.
Dinosaurs lived about 200 million in 3500 million years ago to 6500 million years ago,can support the body upright limb of a class of animals,the control of global terrestrial ecosystems over 100 million 6 million years.Most dinosaurs have become extinct,but the descendants of dinosaurs - birds,survive and reproduce so far.Dinosaur "in the dictionary has two meanings:one living in hundreds of millions of years ago the ancient animal,now extinct.
