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

们发现体型而言，齿鲸生活在危险边缘。

Yes, with a fine toothed comb, as usual.

是的，跟往常一样，一字不漏。

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

因此，齿鲸似乎确实有某体型上的限制。

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

齿鲸和须鲸通常都潜入深，因为深里的猎物更多。

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。所以豚和其齿鲸类动物在水中用回声定位，像蝙蝠一样。

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

总的来说，大鲸鱼有两。齿鲸，如抹香鲸，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和一个更小的锤子进行更详细的建模工作。

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

但是如果不走出家，不能受到一锯齿状的草的启发。

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豚和虎鲸所占据的生态龛位。

They fashion Pandanus leaves into toothed saws.

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.

但最重要的是， 看不到有缝隙的孩子来破坏它。

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

它们有与大脑相关的非常发达的回声定位声纳感觉，那是齿鲸独一无二的特点。

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

比如，从它们的脑部结构来看，齿鲸是没有嗅觉的。

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的。

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

压实的雪是用带齿的刀片犁过的，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.

齿鲸和鳍足类动物， 如豹和狮，可能与巨型企鹅争夺物。

Because it is a scimilar toothed cat.

因为它是一圆齿猫。

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

它的名字实际上意味着“有齿的乌龟”。那些牙齿看起来一点也不像翼龙的牙齿。

It features a pair of jaws called mandibles with toothed inner edges that cut up and crush solid foods, like leaves or other insects.

它具有的特征是这样一对爪子模样的下颌骨，在其内侧有着用来碾碎、咀嚼用的牙齿，通常吃树叶或者是其它昆虫。