They use their voices for talking to each other — and probably not for echolocating, like dolphins do.

它们用声音来彼此说话——可能不像海豚那样进行回声定位。

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类动物在水中用回声定位，就像蝙蝠一样。

The problem with this model is: Onychonycteris didn't echolocate, but it did fly.

这个模型的问题是：Onychonycteris 没有回声定位，但它确实会飞。

And, like Icaronycteris, they've got all the hallmarks of modern bats, and several of them seem to have been able to echolocate, too.

而且， 像 Icaronycteris 一样， 它们具有现代蝙蝠的所有特征，其中一些似乎也能够回声定位。

As its ability to echolocate evolved in power, so too did its ability to make longer jumps, which eventually turned into gliding and powered flight.

随着它回声定位能力的增强，它进行更远距离跳跃的能力也随之增强，最终演变成滑翔和动力飞行。

All I remember being taught was that bats make high-pitched sounds to echolocate as they fly around, but it sounds like there's a lot more to it than that.

以前我学到的知识说蝙蝠飞翔时发出尖锐的声音来做回声定位，但现在看来声音的作用不仅于此。

Plus, weirdly enough, it turns out that it takes a lot of energy to echolocate -- especially when you're stationary - so this whole feeding strategy seems pretty inefficient.

另外，奇怪的是，事实证明回声定位需要大量能量——尤其是当你静止不动时——所以整个喂食策略似乎效率很低。