The skull also lacks a blowhole, another cetacean adaptation for diving.

颅骨上缺少个可以进行适应性潜水排气孔。

At new risk are cetaceans like the North Atlantic right whales.

对北大西洋露脊鲸这类鲸目科动物来讲同样面临着这种新致命危险。

Very exciting discoveries have finally allowed scientists to reconstruct the most likely origins of cetaceans.

这项非常令人兴奋发现终于使科学家们能够重建鲸目动物最有可能起源。

The cetacean had rammed our frigate at about eleven o'clock in the evening.

战舰跟那鲸鱼冲撞时间在夜间十点钟左右。

I'm from Mystic Aquarium in Mystic, Connecticut. I'm a trainer of cetaceans and pinnipeds there.

我来自康涅狄格秘水馆。我鲸目动物和鳍足类动物教练。

It is one of the earliest whales and the oldest cetacean discovered that had functional legs.

它最早发现鲸目动物之，也最早发现有腿鲸目动物。

No argument, sir, since our craft breathes in the manner favored by cetaceans.

那不用说，先生，因为我们船跟鲸鱼类般呼吸。

Like a cetacean's tail, its propeller churned the waves slowly.

它推进器像鲸鱼类尾巴般，慢慢地冲开海浪。

Roughly speaking, these animals filled the ecological niches now occupied by toothed cetaceans such as dolphins and killer whales.

大致上讲，这些动物填补了由现代齿鲸目动物海豚和虎鲸所占据生态龛位。

These cetaceans, he asked, are they as big as the ones in the northernmost seas?

这里鲸鱼类动物跟北极海中样大吗？他问。

I observed it carefully, trying to find out the nature of this gigantic cetacean.

我很注意地观察它，想法辨认这条巨大晾鱼类动物性质。

Every cetacean known to man is endangered.

任何人类已知鲸类动物。

If saving cetacean species from extinction.

如果依靠国际捕鲸委员会。

Ichthyosaurs also resembled cetaceans in another way: unlike most living reptiles, which lay eggs, they gave birth to live young.

大多数现存爬行动物靠产卵繁殖，而鱼龙通过怀胎产子。

Like other aquatic mammals, such as dolphins and porpoises, this wolf-sized animal, known as Pakicetus, is part of the cetacean group.

像其他水生哺乳动物，如海豚和鼠海豚样，这种体型像狼样大小动物被称为巴基斯坦古鲸，鲸类员。

I drew Conseil's attention to the considerable growth of the cerebral lobes found in these intelligent cetaceans.

我给康塞尔指出，这种聪明鲸科动物，大脑叶特别发达。

Arriving within a few cable lengths of the cetacean, our longboat slowed down, and the sculls dipped noiselessly into the tranquil waters.

到了距离这鲸科动物还有几盲米远时候，小艇就慢慢地走，奖没有声息地放到平静水中去。

Our frigate drew nearer to the cetacean. I examined it with a completely open mind.

我们战舰埃近了这个鲸鱼类动物。

The authorities in Australia say a further 200 whales have become stranded off Tasmania, taking the total number of beached cetaceans to 470.

澳大利亚当局表示，又有200头鲸鱼在塔斯马尼亚搁浅，使搁浅鲸类总数达到470头。

And just for one day, would it displease you to return to your fisherman's trade and add this cetacean to the list of those you've already hunted down?

将来您再操叉鱼这行时候，把这只鲸科动物加在您曾经打过鲸鱼账上，您不会不高兴吧？