海豚先用它们的吻突将小鱼赶到大海螺壳中，然后将螺壳带出水面并晃动。
Dolphins first trap small fish in large conch shells with their rostrums (beaks). They then bring the shells to the surface and shake them.
例如，你可能会回想起几年前的一篇期刊论文，描述了海豚是如何使用海绵来保护它们的吻突和帮助捕鱼的。
For example, you might recall the journal paper from a few years ago describing how dolphins use sponges to protect their beaks and to help with fishing.
按照我们的分类标准，仅是本世纪的头十年，我们就发现了大约300种哺乳动物新物种——大部分是啮齿类，也有有袋类，突吻鲸类以及大量的灵长类动物。
Even within our own class, mammals, roughly 300 new species have been discovered in the first decade of this century-mostly rodents, but also marsupials, a beaked whale and a slew of primates.
电脑模型表明，突吻鲸能过滤掉声纳大部分的中频声波，而声纳也不会影响这些鲸鱼用来捕猎的高频声波。
The computer model finds that mid-frequency sonar is mostly filtered out for the whales, while the higher frequencies the animals use for hunting appear to be unimpeded by sonar.
研究者们扫描了雄性突吻鲸的颅骨，从而创建了这种鲸鱼听力组织的3d模型。
By scanning male beaked whale skulls, the researchers imaged the whale hearing apparatus in 3-d.
其它有齿鲸包括宽吻海豚、突吻鲸以及白鲸。
Other toothed whales are the bottlenose, the beaked whale, and the white whale.
其它有齿鲸包括宽吻海豚、突吻鲸以及白鲸。
Other toothed whales are the bottlenose, the beaked whale, and the white whale.
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