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。
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。
Obviously sleeping safely at sea can pose problems, but the Marine mammal system has addressed them.
显然安全地在海里睡觉会产生一些问题，但海洋动物的系统已解决了这些问题。
Now just a few hundred European mink remain-making them Europe's most endangered mammal. to save the mink, scientists are establishing a breeding population of them on an island in the BALTIC SEA.
目前只有几百只欧洲鼬存活——这使它们成为欧洲最濒于灭绝的哺乳动物。
The sea otter is a small mammal that lives in waters along the western coast of North America from California to Alaska.
海獭是一种生活在北美西海岸从加州到阿拉斯加沿线的小型海洋哺乳动物。
The sea otter is a small mammal that lives in waters along the western coast of North America from California to Alaska.
海獭是一种生活在北美西海岸从加州到阿拉斯加沿线的小型海洋哺乳动物。
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