Some scientists, however, say that the dolphin, a sea mammal, is just as smart.

然而，有些科学家说，海豚，一种海中的哺乳动物，也有那么聪明。

youdao

Dr Vincent Janik, of the sea Mammal Unit at St Andrews University, said they conducted the research on wild dolphins.

圣安德鲁大学海洋哺乳动物研究中心的文森特·雅尼克博士说，他们的研究对象是野生海豚。

youdao

The manatee, often called the sea cow , is the only exclusively herbivorous marine mammal.

海牛，通常也称之为海中之牛，是唯一一种海洋食草哺乳动物。

youdao

Joining us to talk about this is Vincent Janik of the Sea Mammal Research Unit at the University of St.

NPR: Study: Dolphins Call Out Their Own Names

That definition is ambiguous, so extremists have taken it to mean anything, including the possibility of a vessel's disturbing a resting sea mammal.

FORBES: Fact and Comment

Zoos and aquariums also assisted with sea otter rescue and recovery efforts after the Exxon Valdez oil spill and continue to assume leadership roles in helping the public understand the importance of protecting the sea otter, as well as making major contributions to ongoing marine mammal rescue and recovery programs.

CNN: Oil spill lessons offer hope for sea otters