quadding

例句：

1. 1. The dog is a quadruped that can run very fast.
   这只狗是一只四足动物，跑得非常快。
2. 2. Quadrupeds are animals with four legs and two back feet.
   四足动物是有四只腿和两只后脚的动物。
3. 3. Many quadrupeds live in the forests, such as deer and bears.
   许多四足动物生活在森林中，比如鹿和熊。