这只四足机器人可以轻松爬上楼梯。
The ___quadruped robot can climb stairs with ease.
牛是一种典型的四足动物，腿部强壮有力。
Cows are typical ___quadrupeds with strong legs.
许多四足动物,比如牛和羊,都是农场里常见的牲畜。
Many ___quadrupeds, such as cows and sheep, are common livestock on farms.
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