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恐龙曾是地球历史上“称王称霸”的动物，生 活在两亿年前的中生代，于６５００万年前突然灭绝。 遗留下的骨骼化石，成为研究的重要资料。恐龙属 于爬行动物，对于后来地球动物的形成有重要影 响，因此研究恐龙的意义十分重大，
The dinosaurs were once the “kings of the world” in earth history. They lived in the Mesozoic era 200 million years ago and were suddenly extinct 65 million years ago. The remains of bone fossils have become important research data. Since dinosaurs belong to reptiles and have important influence on the formation of earth animals in the future, it is of great significance to study dinosaurs.