tetragonum

例句：

1. 1. The dinosaurs were a type of tetragonum that lived during the Cretaceous period.
   恐龙是一种生活在白垩纪时期的四足动物。
2. 2. The scientists discovered a new species of tetragonum in the Amazon rainforest.
   科学家们在亚马逊雨林发现了一种新的四足动物物种。
3. 3.The tetragonum was able to survive in the harsh environment by using its strong legs and sharp claws.
   这种四足动物通过其强壮的腿和锐利的爪子，能够在恶劣的环境中生存下来。