英语作文:我喜欢的恐龙把中文翻释出来40词左右

About 255 million years ago, the planet emergence of a new class of reptiles. Like all reptiles, they are the descendants of the eggs hatching out of their skin covered with scales, impervious, and this is the dinosaur. Emerged from the demise of the dinosaurs until, up to rule the Earth 1.6 billion years old.