恐龙简单英文介绍

dinosaur。

dinosaur，英语单词，名词，作名词时意为“恐龙；过时、落伍的人或事物”。

简介

恐龙（英文名：Dinosaur），是指三角龙，现代鸟类和梁龙最近的共同祖先及其所有后代。

为方便研究，恐龙可分为鸟类和非鸟恐龙。其中，非鸟恐龙只生活在中生代（三叠纪、侏罗纪和白垩纪），已于6500万年前全部灭绝。而本词条主要介绍非鸟恐龙。

矫健的四肢、长长的尾巴和庞大的身躯是部分非鸟恐龙的写照。它们主要栖息于湖岸平原（或海岸平原）上的森林地或开阔地带。

1841年，英国科学家理查德·欧文在研究几块样子像蜥蜴骨头化石时，认为它们是某种史前动物留下来的，并命名为恐龙，意思是“恐怖的蜥蜴”。

Dinosaurs were reptiles that lived through three periods of Earth's geologic history: Triassic (208-245 million years ago), Jurassic (145-208 million years ago), and Cretaceous (65-145 million years ago). Different species of dinosaurs flourished and then became extinct throughout these three periods.All dinosaurs were reptiles, but not all reptiles were dinosaurs. Even though the name "dinosaur" means "terrible lizard," dinosaurs were not lizards at all.Some Key Dinosaur FactsAll dinosaurs had four limbs. Some walked on all four legs; others, on their two back legs.Dinosaur legs were positioned below their bodies, making it possible for them to walk upright. Lizard legs are positioned outward from their bodies, giving them a sprawling posture.Dinosaur legs were positioned under their bodies. They were able to walk and run very efficiently.Dinosaurs lived on land. They did not fly in the air or live in water.Some dinosaurs were carnivores (meat-eaters), but most were herbivores (plant-eaters).Not all dinosaurs were large. The smallest, Compsognathus, was about 3 feet long (1 m). One of the largest, Barosaurus, reached 80 feet (24 m). Tyrannosaurus rex measured 46 feet (14 m).