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地球上最早的恐龙生活在距今2亿多年前,最后一批恐龙于6 500万年前在地球上突然灭绝,大约生活了1.35亿年,是一个很漫长的岁月。现在人们只能通过它们遗留在地层里的化石来了解
The earliest dinosaurs on Earth lived more than 200 million years ago. The last dinosaurs suddenly died on Earth 65 million years ago. About 135 million years have passed since then. It is a very long time. Now people can only learn about the fossils that they have left in the earth