tegosaurus.
释义：n.剑龙
例句：Scientists do not know what the bony plates on the back of the Stegosaurus were for.
科学家们不知道剑龙背上的这些板状的骨头有什么用。
triceratops.
释义：n.三角恐龙
例句：A triceratops was about as tall as a school bus.
一只三角恐龙大约和公共汽车一样高
diplodocus.
释义：n. 梁龙(古生物恐龙的一种)
例句：Diplodocus had a very small brain and was not smart.
梁龙的.脑袋非常小,所以它不聪明。
ichthyosaurus.
释义：n. 鱼龙
例句：A ferocious predator, the Ichthyosaur can ravage even the most hardy prey in seconds.
作为一种凶残的食肉动物，鱼龙可以在几秒内蹂躏最强悍的猎物。