60秒科学:斑点鬣狗会用笑声来交流

斑点鬣狗会咕哝咕哝叫，会吼叫，可是你知道吗？它们最有名的是笑声，是的，咯咯的笑声。

科学家发现，这种动物会用笑声作为语言来交流诸如年龄、身份和地位等信息，这样，就知道把猎获的肉中最美味的那一块给谁享用了。是不是很有趣?

Hyena¹ Laughter Is Serious Business

Spotted² hyenas³ grunt⁴ and growl⁵. But you know what they're famous for. [Hyena sounds.] So what's all the laughing about?

Well, field researchers have noticed that groups of hyenas tend to giggle⁶ around a kill, while they're waiting for their hunk of meat. Now a study in the journal BMC Ecology  says the chuckles⁷ may communicate things like age, identity and social status. Which is important stuff for figuring out who gets the tastiest cut of zebra.

Researchers [Nicolas Mathevon et al.] studied a clan⁸ of spotted hyenas living in a sanctuary⁹ behind the U.C. Berkeley campus. They enticed¹⁰ 17 hungry hyenas with bones or pieces of meat, and recorded about 250 bouts¹¹ of giggling¹². Then they ran those sound bites through various computer algorithms, running statistical¹³ analyses and drawing up spectrograms.

The result? They say a giggle's pitch and timbre¹⁴ establish a hyena's identity, and that pitch indicates age. But the giggle also tells you who's boss. A relatively¹⁵ monotone giggle [hyena sound] and you're first to the meat. A more erratic¹⁶, variable giggle? [Hyena sound] Get back in line.

The researchers next plan to study hyenas in the wild. Just for laughs.

—Christopher Intagliata
 

1 hyena   

n.土狼，鬣狗

参考例句：

• African hyena noted for its distinctive howl.非洲鬣狗，以其特别的嚎叫而闻名。
• The hyena's public image is not aided by its ridiculous appearance.鬣狗滑稽的外表无助于改善它在公众心中的形象。

2 spotted   

adj.有斑点的，斑纹的，弄污了的

参考例句：

• The milkman selected the spotted cows,from among a herd of two hundred.牛奶商从一群200头牛中选出有斑点的牛。
• Sam's shop stocks short spotted socks.山姆的商店屯积了有斑点的短袜。

3 hyenas   

n.鬣狗( hyena的名词复数 )

参考例句：

• These animals were the prey of hyenas. 这些动物是鬣狗的猎物。 来自辞典例句
• We detest with horror the duplicity and villainy of the murderous hyenas of Bukharinite wreckers. 我们非常憎恨布哈林那帮两面三刀、杀人破坏，干尽坏事的豺狼。 来自辞典例句

4 grunt   

v.嘟哝；作呼噜声；n.呼噜声，嘟哝

参考例句：

• He lifted the heavy suitcase with a grunt.他咕噜着把沉重的提箱拎了起来。
• I ask him what he think,but he just grunt.我问他在想什麽，他只哼了一声。

5 growl   

v.（狗等）嗥叫，（炮等）轰鸣；n.嗥叫，轰鸣

参考例句：

• The dog was biting,growling and wagging its tail.那条狗在一边撕咬一边低声吼叫，尾巴也跟着摇摆。
• The car growls along rutted streets.汽车在车辙纵横的街上一路轰鸣。

6 giggle   

n.痴笑，咯咯地笑；v.咯咯地笑着说

参考例句：

• Both girls began to giggle.两个女孩都咯咯地笑了起来。
• All that giggle and whisper is too much for me.我受不了那些咯咯的笑声和交头接耳的样子。

7 chuckles   

轻声地笑( chuckle的名词复数 )

参考例句：

• Father always chuckles when he reads the funny papers. 父亲在读幽默报纸时总是低声发笑。
• [Chuckles] You thought he was being poisoned by hemlock? 你觉得他中的会是芹叶钩吻毒吗？

8 clan   

n.氏族，部落，宗族，家族，宗派

参考例句：

• She ranks as my junior in the clan.她的辈分比我小。
• The Chinese Christians,therefore,practically excommunicate themselves from their own clan.所以，中国的基督徒简直是被逐出了自己的家族了。

9 sanctuary   

n.圣所，圣堂，寺庙；禁猎区，保护区

参考例句：

• There was a sanctuary of political refugees behind the hospital.医院后面有一个政治难民的避难所。
• Most countries refuse to give sanctuary to people who hijack aeroplanes.大多数国家拒绝对劫机者提供庇护。

10 enticed   

诱惑，怂恿( entice的过去式和过去分词 )

参考例句：

• He enticed his former employer into another dice game. 他挑逗他原来的老板再赌一次掷骰子。
• Consumers are courted, enticed, and implored by sellers of goods and services. 消费者受到商品和劳务出售者奉承，劝诱和央求。

11 bouts   

n.拳击（或摔跤）比赛( bout的名词复数 )；一段（工作）；（尤指坏事的）一通；（疾病的）发作

参考例句：

• For much of his life he suffered from recurrent bouts of depression. 他的大半辈子反复发作抑郁症。 来自《简明英汉词典》
• It was one of fistiana's most famous championship bouts. 这是拳击界最有名的冠军赛之一。 来自《现代英汉综合大词典》

12 giggling   

v.咯咯地笑( giggle的现在分词 )

参考例句：

• We just sat there giggling like naughty schoolchildren. 我们只是坐在那儿像调皮的小学生一样的咯咯地傻笑。 来自《简明英汉词典》
• I can't stand her giggling, she's so silly. 她吃吃地笑，叫我真受不了，那样子傻透了。 来自《现代英汉综合大词典》

13 statistical   

adj.统计的，统计学的

参考例句：

• He showed the price fluctuations in a statistical table.他用统计表显示价格的波动。
• They're making detailed statistical analysis.他们正在做具体的统计分析。

14 timbre   

n.音色，音质

参考例句：

• His voice had a deep timbre.他嗓音低沉。
• The timbre of the violin is far richer than that of the mouth organ.小提琴的音色远比口琴丰富。

15 relatively   

adv.比较...地，相对地

参考例句：

• The rabbit is a relatively recent introduction in Australia.兔子是相对较新引入澳大利亚的物种。
• The operation was relatively painless.手术相对来说不痛。

16 erratic   

adj.古怪的，反复无常的，不稳定的

参考例句：

• The old man had always been cranky and erratic.那老头儿性情古怪,反复无常。
• The erratic fluctuation of market prices is in consequence of unstable economy.经济波动致使市场物价忽起忽落。