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.

是的，跟往一样，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.

齿鲸和须鲸通入深海，因为深海里的猎物更多。

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。所以海豚和其他齿鲸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.

总的来说，大鲸鱼有两种。齿鲸，如抹香鲸，个猎物。

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的草的启发。

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。

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的生态龛位。

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发达的回声定位声纳感觉，那是齿鲸独一无二的特点。

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

它具有的特征就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，通吃树叶或者是其它昆虫。

This is a particularly interesting theory since the whales that are thought to be most social - the toothed whales - are the group that strand the most frequently.

这是一个很有意思的理论，因为鲸鱼（齿鲸）被认为是最爱群居的动物，它们最频繁的成群搁浅。