剑齿兽

例句：

1. 1. The ancient dinosaurs, such as the T-Rex and the Stegosaurus, are now extinct.
   像霸王龙和剑龙这样的古代恐龙已经灭绝了。
2. 2. The discovery of a new species of dinosaur has sparked excitement in paleontologists.
   发现一种新的恐龙物种，让古生物学家们兴奋不已。
3. 3. The fossilized remains of the Stegosaurus, also known as the "King of Dinosaurs," have been found in China.
   被称为“恐龙之王”的剑龙化石在中国被发现。