科学美国人60秒 SSS 2014-09-04_在线英语听力室

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Biologists used to think turtles belong to the silent majority of reptiles², meaning if turtles made sounds, no one is listening. One reptile¹ guy from the 1950s went so far as to call them quote deaf as a post. But it turns out scientists just weren't listening hard enough, because in recent years biologists have identified at least eleven different sounds in the turtle repertoire³, reported both in and out of the water. But what do they mean?

In the latest attempt to decode⁴ turtle talk, researchers tailed giant South American river turtles, xxx, in Brazil over two years' span. They recorded two hundred and twenty hours of audio, capturing six of those eleven sounds. Two of the causes were extremely common, occurring during just about every turtle activity. Other cause the turtle made only during migration⁵ or well nesting at night. The findings appear on the journal xx.

The researchers still aren't sure what any of these sounds actually mean, or whether turtles can recognize each other by voice alone. Although more reason they say, to use these sounds in playback experiments, which may get these talking turtles out of their shells.

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1 reptile
n.爬行动物；两栖动物
参考例句：
The frog is not a true reptile.青蛙并非真正的爬行动物。 So you should not be surprised to see someone keep a reptile as a pet.所以，你不必惊奇有人养了一只爬行动物作为宠物。

2 reptiles
n.爬行动物，爬虫( reptile的名词复数 )
参考例句：
Snakes and crocodiles are both reptiles. 蛇和鳄鱼都是爬行动物。来自《简明英汉词典》 Birds, reptiles and insects come from eggs. 鸟类、爬虫及昆虫是卵生的。来自《现代汉英综合大词典》

3 repertoire
n.(准备好演出的)节目，保留剧目；(计算机的)指令表，指令系统， <美>(某个人的)全部技能；清单，指令表
参考例句：
There is an extensive repertoire of music written for the flute.有很多供长笛演奏的曲目。 He has added considerably to his piano repertoire.他的钢琴演奏曲目大大增加了。

4 decode
vt.译（码），解（码）
参考例句：
All he had to do was decode it and pass it over.他需要做的就是将它破译然后转给他人。 The secret documents were intercepted and decoded.机密文件遭截获并被破译。

5 migration
n.迁移，移居，（鸟类等的）迁徙
参考例句：
Swallows begin their migration south in autumn.燕子在秋季开始向南方迁移。 He described the vernal migration of birds in detail.他详细地描述了鸟的春季移居。

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科学美国人60秒 SSS 2014-09-04