Dolphins are social mammals, capable of enjoying their lives. They form close bonds with other members of their group.

Dolphins are social mammals, capable of enjoying their lives. They form close bonds with other members of their group.

海豚是社会性哺乳动物，能够享受生活。他们与群体中的其他成员形成紧密的联系。

-- Peter Albert David Singer 彼得·艾伯特·大卫·辛格