Toothed whales, they found, are living on the edge, size-wise.

他们发现就体型而言，齿鲸生活在危险边缘。

Yes, with a fine toothed comb, as usual.

是，跟往常一样，一字不漏。

Toothed whales thus do seem to have hit some sort of size limit.

因此，齿鲸似乎确实有某种体型上限制。

Both toothed and baleen whales often hunt by diving deep-prey being more abundant at depth.

齿鲸须鲸通常都潜入深海捕食，因为深海里猎物更多。

Indeed, some toothed whales and bats emit sound pulses around 200,000 hertz and listen for the reflections.

事实上，一些齿鲸蝙蝠会发出 20 万赫兹声脉冲收听反射声。

Light doesn't travel well underwater. So dolphins and other toothed whales navigate like bats, using echolocating clicks.

光在水中会衰减。所以海豚其他齿鲸类动物在水中用回声定位，就像蝙蝠一样。

Broadly, big whales come in two varieties. Toothed whales, such as sperm whales, hunt individual prey.

来说，大鲸鱼有两种。齿鲸，如抹香鲸，捕食单个猎物。

Then you'd use a toothed tool and a smaller hammer for more detailed work in modeling the form.

然后会使用一个齿形工具一个更小锤子进行更详细建模工作。

But if he had not walked outside, he would not have been inspired by a kind of toothed grass.

但是如果他不走出家门，他就不能受到一种锯齿状草启发。

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虎鲸所占据生态龛位。

They fashion Pandanus leaves into toothed saws.

他们将露兜叶做成齿锯。

And with that, they've evolved from being toothed whales.

因此，它们已经从齿鲸进化而来。

But best of all no gap toothed kid in sight to wreck it.

但最重要是， 看不到有缝隙孩子来破坏它。

They have very keenly developed echo location sonar sense associated with their brains that is a unique feature of toothed whales.

它们有与大脑相关非常发达回声定位声纳感觉，那是齿鲸独一无二特点。

For example, it appears from their brain structure that toothed species are unable to smell.

比如，从它们脑部结构来看，齿鲸是没有嗅觉。

They are smaller, but a bit scarier as they are the biggest of the toothed whales.

它们体型较小， 但更可怕，因为它们是齿鲸中体型最大。

Packed snow is ploughed with a toothed blade which creates grooved ridges that give traction for bike tires.

压实雪是用带齿刀片犁过，它会形成凹槽脊，为自行车轮胎提供牵引力。

Toothed whales and pinnipeds, like seals and sea lions, might have competed with the giant penguins for food.

齿鲸鳍足类动物， 如海豹海狮，可能与巨型企鹅争夺食物。

Because it is a scimilar toothed cat.

因为它是一种圆齿猫。

Its name actually means " toothed turtle." And those teeth looked nothing like pareiasaur teeth.

它名字实际上意味着“有齿乌龟”。那些牙齿看起来一点也不像翼龙牙齿。