听力文本

This is Scientific American — 60-Second Science. I'm Christopher Intagliata.
Killer whales, also called orcas, are like dolphins and belugas—they all have a wide vocal repertoire. (orca sounds) But orcas also have unique dialects among different pods. Which suggests the animals can learn new and unique sounds by imitating mom, or another whale.
Researchers tested that premise by asking a killer whale named Wikie to imitate novel sounds from another killer whale, like this (Wolf sound) or this ( creaking door sound).
And then: Wikie's trainers asked her to imitate them speaking English. Here's how she did: ("Amy, hello")
Pretty impressive, especially because she's using her nasal passages to imitate sounds we make with our vocal cords.

And a technical acoustic analysis of the original and imitated sounds showed that Wikie was doing a reliable job of mimicry, suggesting orcas do indeed possess the ability of vocal imitation. The study is in the Proceedings of the Royal Society B.
So how long before Wikie's fluent in English? Well: "This is not our goal." Study author José Zamorano-Abramson, a comparative psychologist. "We are focusing on one aspect of vocal language, which is the capacity for vocal imitation." Because the ability to imitate implies a way to transmit culture... and they doing so preserve each orca pod's unique repertoire. ("bye bye")
Thanks for listening for Scientific American — 60-Second Science. I'm Christopher Intagliata.

参考译文

这里是科学美国人——60秒科学J]06(md#20OZQbn0。我是克里斯托弗·因塔利亚塔G*,3M&i4C]Y8KuRBD。
虎鲸，也被称为“逆戟鲸”，像海豚和白鲸一样，虎鲸也拥有丰富的叫声qZ)0!.YGQ)#ZNqNMs。（逆戟鲸的叫声）但是每个逆戟鲸群也有自己独特的方言zLj]D;,4sQF^。这表明逆戟鲸可以通过模仿母亲或其他鲸鱼来学习新奇且独特的声音^Ki=shT)*JTMc。
研究人员对这一假设进行了测试，他们让一只名为维基的虎鲸模仿其它虎鲸发出的新声音，比如（狼叫声）或是（敲门声）fZsve-O6xM。
然后：维基的训练员让她模仿他们说英语A=U|~4!rlW。她是这么做的：（艾米，你好）
这令人印象非常深刻，尤其是因为她用鼻腔模仿我们用声带发出的声音DwJr=i-9ia*LF2Fa8。
对原声和模拟声音进行的专业声学分析表明，维基的模仿非常可靠，这说明逆戟鲸的确拥有声音模仿能力XbuS&qz)8~b%APg1|ci]。这项研究结果发表在《英国皇家学会学报：B辑》上B283H0ISgCvs。
那维基要用多长时间才能说出流利的英语？“这并不是我们的目标5ecD5kkg6V^mW@y-TSw。”研究作者、比较心理学家何塞·萨莫拉诺·艾布拉姆森说~zh);)7zlylqNy#RT。“我们关注的是有声语言的其中一个方面，即声音模仿的能力*Y~T1CByxa。”因为模仿能力意味着一种传播文化的方式，而虎鲸这样做可以保留每个群体的独特语言#%*i3Xg_#P。（再见）
谢谢大家收听科学美国人——60秒科学i]E^qnC.sqX。我是克里斯托弗·因塔利亚塔.XLAc,Kj!v8。

译文为可可英语翻译，未经授权请勿转载！

重点讲解

重点讲解：
1. ask sb. to do sth. 要求…（做…）；请求…（做…）；
Homework assignments and examinations will often ask you to explain something or to define something that you have been taught.
在作业和考试过程中，常常会要求你解释或定义一些你已经学过的事物x^gqP^E*X,。
2. be fluent in 流利的；流畅的；
She studied eight foreign languages but is fluent in only six of them.
她学习了8种外语，但是只能流利地说其中 6 种4ma3OB~XAEo[QnB[5。
3. focus on 集中(注意力)；关注；
In this article, we focus on encryption and digital signatures.
本文中我们主要讨论加密和数字签名,5k#lKy76l%4+(p5]-F。