plesiosaur

例句：

1. 1. The dinosaur museum has a plethoraof exhibits about the ancient creatures.
   恐龙博物馆有关于古代生物的丰富展品。
2. 2.Plesiosaurs were among thefirst animals to have wings.
   翼龙是第一批拥有翅膀的动物之一。
3. 3. Thediscovery of fossilizeddinosaur bones in thedesert led scientists to re-examine their theories about these ancient creatures.
   在沙漠中发现石化的恐龙骨骼使科学家重新审视了这些古老生物的理论。