四足动物

例句：

1. 1. The lion is a majestic creature that belongs to the feline family.
   狮子是一只壮观的动物，属于猫科。
2. 2. Many amphibians, such as frogs and toads, are known for their ability to breathe underwater.
   许多两栖动物，如青蛙和蟾蜍，以其在水下呼吸的能力而闻名。
3. 3. Some insects have evolved to walk on four legs, making them more efficient in their environment.
   一些昆虫已经进化成四足行走，这使得它们在环境中更加高效。