Xenosauridae

例句：

1. 1. The Xenosauridae is one of the largest groups of dinosaurs.
   剑龙科是最大的恐龙之一。
2. 2. The discovery of a new species of Xenosauridae has sparked excitement among paleontologists.
   发现一种新的剑龙科物种，让古生物学家们兴奋不已。
3. 3.The Xenosauridae was once thought to be extinct, but recent discoveries have revived hope for their survival.
   剑龙科一度被认为是已经灭绝的，但最近的发现让人们重新对它们的存续抱有希望。