Tetrabothridiata

例句：

1. 1. This species of tetratherid is known for its unique four-legged design.
   这种四足虫因其独特的四足设计而闻名。
2. 2. The tetratherid was discovered in the deep ocean, where it lives in harmony with its environment.
   这种四足虫在深海被发现，与环境和谐共存。
3. 3. Due to their unique features, tetratherids are often used as models for studying animal behavior.
   由于其独特的特征，四足虫常被用作研究动物行为的模型。