水生哺乳动物篇 PART EIGHT
水生哺乳动物学 [脊椎] aquatic mammalogy
欧洲水生哺乳动物协会 european association for aquatic mammals
它头骨的耳朵区域具有只有水生哺乳动物才有的特征，特别像鲸鱼。
The ear area of its skull had characteristics seen only in aquatic mammals, specifically whales.
海牛是生活在佛罗里达河流和沿海水域的水生哺乳动物，它们游到海面附近，经常在与船只相撞时被撞死。
Manatees, aquatic mammals inhabiting Florida's rivers and coastal waters, swim close to the surface and are frequently killed in collisions with boats.
海豚、鲸鱼以及水生哺乳动物睡眠都极少，这一事实可以给睡眠的根本功能提供有用的线索。
Perhaps one useful hint about the original function of sleep is to be found in the fact that dolphins and whales and aquatic mammals in general seem to sleep very little.
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