倆宝麻麻
地球的历史已经有45亿年了。在距今约束38亿年前出现了最早的生物。从那时起，地球上的很多生物经历了兴起、衰落直至灭亡的历程，只有化石留存至今。现在世界各地都能找到各个时期不同种类的化石，这些化石告诉了我们地球沧海桑田的变迁历史。 距今两亿多年前，地球上曾经生活着一群生物——恐龙。它们盛极一时，称霸地球达成1.5亿年之久。 在人类出现以前，恐龙就已经灭绝了，没有人见到过活的恐龙。今天我们所知道的有关恐龙的一切是从恐龙的化石得来的。由于人们找到了它们的骨、齿、卵的化石，和皮肤痕迹、脚印、穴居场所等，科学家们就根据这些线索去探索有关恐龙的秘密。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.
青柠果茶
There are many guesses on how dinorsaurs became extinct.I will now unfold some of those theories.
The first one is that dinorsaurs died because the earth was stuck by a nother planet,it caused earthquake and volcano eruption everywhere,and the poor dinorsaurs have nowhere to escape.
Another one is that,the earth became very cold,so plants died followed by the death of vegetarian dinorsaurs,and led to the death of carnivore dinorsaurs,so they all died.
These are the main guesses on how dinosaurs became extinct.
翻译
关于恐龙是如何灭绝的，有很多猜测。现在我将介绍其中的一些理论。
第一个是恐龙的死亡是因为地球被另一颗行星卡住了，到处都是地震和火山爆发，可怜的恐龙无处可逃。
另一个原因是，地球变得非常寒冷，因此植物死亡，接着是素食恐龙死亡，并导致食肉恐龙死亡，因此它们都死亡。
这些是关于恐龙是如何灭绝的主要猜测。
traveler0723
Dinosaurs are very large creatures which appeared on the earth millions of years ago.They became extinct many years later because of a change in climate and they could no longer find any food to eat.Today,people know that dinosaurs had once existed because scientists discovered the remains of their bones when they dug underneath the ground.We can see the skeletons of these dinosaurs now in the museums.
