Young birds learn their vocalizations much like young humans learn languages.

幼鸟学习发声就像年轻人学习语言一样。

They'd finely shape the vocalization into enunciated words using their tongue and lips.

人使用舌头和嘴唇，将声音精细地塑造成清晰的词。

The pointy-headed songbirds are talented mimics, often copying the vocalizations of other bird species.

这些聪明的鸣鸟是天才模仿者，它们经常模仿其它鸟类的叫声。

All in all, Brady and her team spent about seven years recording manatee vocalizations.

总而言之，Brady 和团队用了大概7年时间录制海牛叫声。

Only a few kinds of animals are known to learn their vocalizations from listening to others.

目前已知只有少数几种动物通过听同伴的声音来学习发声。

Researchers collected almost 200 sound samples, including human and canine vocalizations, as well as environmental noises and silence.

研究人员们采集了大约200份声音样本，其中包含了人类和犬类的发音，以及环境噪音和静默时的背景声音。

By restricting their vocalizations to the higher frequencies, including ultrasound, the frogs are better able to hear each other.

通过将它们的叫声限制在更高的频率，包括超声波，青蛙们能更好地听到彼此的叫声。

Keeping these experimental vocalizations to a whisper makes sense if you want to avoid attracting predators to your nest.

如果你想避免把捕食者引到巢穴，让这种实验性发声保持低音量是有意义的。

The tags could track depth and location—and also record vocalizations.

这种标记可以追踪它们所处的位置和深度—当然也可以记录发出的声音。

Many other animals that hunt in groups use vocalizations to keep connected.

其他许多成群捕猎的动物都用回声定位来保持联系。