tetradactyl

例句：

1. 1.The horse has four legs and is a tetradactyl.
   这匹马有四条腿，是一种四蹄兽。
2. 2. Quadrupeds are animals with four legs.
   四足动物是有四条腿的动物。
3. 3. The quadruped was able to walk on all fours.
   这个四足动物能够用四肢行走。