common seal

例句：

1. 1. The common seal is a mammal that lives in the ocean.
   海豹是一种生活在海洋中的哺乳动物。
2. 2.Sea lions are known for their playful nature and their ability to swim long distances.
   海狮以其嬉戏的特性和游泳长距离的能力而闻名。
3. 3. Seals are often seen swimming in groups and playing together.
   海豹经常成群结队地游动，并一起玩耍。