沧龙英语

恐龙简介恐龙是出现于二亿四千五百万年前，并繁荣于六千五百万年前结束的中生代爬行动物。或为恐龙和与它同一时代的蛇颈龙、翼龙等的模糊总称。恐龙在在6500万年前白垩纪结束的时候突然全部消失，成为地球生物进化史上的一个谜，这个谜至今仍无人能解。地球过去的生物，均被记录在化石之中。中生代的地层中，即曾发现许多恐龙的化石。其中可以见到大量或呈现各式各样形状的骨骼。但是，在紧接着的新生代地层中，却完全看不到恐龙的化石。由此推知恐龙在中生代时一起灭绝了。恐龙种类多，体形和习性相差也大。其中个子大的，可以有几十头大象加起来那么大；小的，却跟一只鸡差不多。就食性来说，有温顺的 草食者和凶暴的肉食者，还有荤素都吃的杂食性恐龙。Dinosaur ProfileDinosaurs appeared in two hundred forty-five million years ago, and prosperity at the end of the Mesozoic reptiles 65 million years ago. , Or dinosaurs, and with it the same era plesiosaurs, pterosaurs and other fuzzy generic term. Dinosaurs in the Cretaceous period ended 65 million years ago when all of a sudden disappeared, a mystery of the evolutionary history of life on Earth, is still without a person who can answer this mystery. Creatures of the Earth in the past, are being recorded in the fossil. Mesozoic strata, that many dinosaur fossils have been found. Where you can see the bones of large or presents a wide range of shapes. However, in the following Cenozoic strata, but completely see less than the fossils of dinosaurs. We concluded that with the extinction of the dinosaurs in the Mesozoic.Many kinds of dinosaurs, body shape and habits also big difference. Large sub then dozens of elephants together; small, but with almost a chicken. Docile herbivorous, feeding habits,The meat eaters and violent, as well as meat and vegetables to eat omnivorous dinosaur.

马斯垂克阶（英语：Maastrichtian）是白垩纪，亦即中生代最后的一个时期，时间为70.6 ± 0.6 百万年前至 65.5 ± 0.3 百万年前。在本时期末期发生了白垩纪-第三纪灭绝事件，恐龙、蛇颈龙、沧龙等生物绝种。

雪佛兰speak english。