Quadrula

例句：

1. 1. Quadrupeds are animals that have four legs.
   四足动物是有四条腿的动物。
2. 2. Quadrupeds are found in many different habitats.
   四足动物存在于许多不同的栖息地中。
3. 3. The quadruped was able to walk on all fours.
   这种四足动物能够用四肢行走。