耳朵主要的用途是能够侦听到甚至是最微弱的声响，比如食肉动物的接近，当然也包括猎物活体的所在位置。
Mainly, large ears can detect even the smallest of sounds such as approaching predators and of course, the presence of live food.
从那种意义上来说，比起其他爬行动物的大脑它们更接近哺乳动物的大脑。
In that sense, they are closer to mammals' brains than other reptiles' brains.
最终，科学家们通过一些非常令人振奋的发现，复原了最接近其原貌的鲸类动物的样子。
Very exciting discoveries have finally allowed scientists to reconstruct the most likely origins of cetaceans.
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