Tyrannosaurus was one of the largest dinosaurs. Compsognathus was the size of a turkey. The largest of all was a group called Sauropods. The huge Sauropod, Barosaurus, might have been able to reach the top of a five-story building.
霸王龙是最大的恐龙之一。美颌龙只有火鸡的大小。最大恐龙类群是蜥脚类恐龙。巨大的蜥脚恐龙和重龙可能高达一栋五层建筑。
Sauropods were the biggest plant eaters. A Sauropod called Apatosaurus ate huge amounts of green plants every day. He didn't chew them but swallowed them along with stones that ground up the food in its stomach. Hadrosaurus had a beak like a duck and ripped up vegetation. He had more than 40 rows of teeth. Some plant eaters may have formed herds to defend themselves against the predatory meat eaters who had larger, sharper teeth.
蜥脚类恐龙是最大的食草动物。一种叫迷惑龙的蜥脚类恐龙每天进食大量的绿色植物。它没有咀嚼,连同石头一块儿吞咽,最后在胃内磨碎的食物。鸭嘴龙有着鸭子般的喙,它喜欢撕碎植被。它有40多排牙齿。一些食草动物成群活动从而保护自己免于体型更大、牙齿更加锋利肉食性动物的掠食。
The largest meat-eating dinosaur was the Giganotosaurus. Scientists think he may have weighed eight tons. Suchomimus ate fish and had a head like a crocodile. Baryonyx lived near water and also ate fish. His curved claw could spear fish. Tyrannosaurus was huge, but slow, and may have used his big head to butt against prey.
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