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SSS 2011-10-12

时间:2011-11-01 08:03来源:互联网 提供网友:gmeng   字体: [ ]
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    (单词翻译:双击或拖选)

 This is Scientific American's 60-Second Science. I'm Sophie Bushwick. Got a minute?

 
Jiminy Cricket may not actually hold the door open for his lady friends, but he can still be chivalrous1: researchers from the University of Exeter discovered that when threatened by predators2, a male field cricket will protect his mate by letting her enter their burrow3 first. The work is published in the journal Current Biology. 
 
Using microphones and infrared4 cameras, researchers monitored a Spanish cricket population for three seasons. They identified each cricket with a tiny numbered nametag and a DNA5 fingerprint6 taken from a sample of its leg. This Big Brother scrutiny7 revealed the details of cricket relationships, from their courtship time to how they conducted their affairs. 
 
Previous studies of crickets' behavior examined them in a lab setting, where males acted aggressively towards other males and mates alike. In the wild, however, males still brawled8 with rivals. But they formed long-term relationships by protecting, not dominating, their partners.
 
So why guard his gal9? A gentlemanly cricket fosters a longer relationship, with more mating and more offspring. So chivalry10 may not be dead—but it's not entirely11 altruistic12 either.
 
Thanks for the minute. For Scientific American's 60-Second Science, I'm Sophie Bushwick.

点击收听单词发音收听单词发音  

1 chivalrous 0Xsz7     
adj.武士精神的;对女人彬彬有礼的
参考例句:
  • Men are so little chivalrous now.现在的男人几乎没有什么骑士风度了。
  • Toward women he was nobly restrained and chivalrous.对于妇女,他表现得高尚拘谨,尊敬三分。
2 predators 48b965855934a5395e409c1112d94f63     
n.食肉动物( predator的名词复数 );奴役他人者(尤指在财务或性关系方面)
参考例句:
  • birds and their earthbound predators 鸟和地面上捕食它们的动物
  • The eyes of predators are highly sensitive to the slightest movement. 捕食性动物的眼睛能感觉到最细小的动静。 来自《简明英汉词典》
3 burrow EsazA     
vt.挖掘(洞穴);钻进;vi.挖洞;翻寻;n.地洞
参考例句:
  • Earthworms burrow deep into the subsoil.蚯蚓深深地钻进底土。
  • The dog had chased a rabbit into its burrow.狗把兔子追进了洞穴。
4 infrared dx0yp     
adj./n.红外线(的)
参考例句:
  • Infrared is widely used in industry and medical science.红外线广泛应用于工业和医学科学。
  • Infrared radiation has wavelengths longer than those of visible light.红外辐射的波长比可见光的波长长。
5 DNA 4u3z1l     
(缩)deoxyribonucleic acid 脱氧核糖核酸
参考例句:
  • DNA is stored in the nucleus of a cell.脱氧核糖核酸储存于细胞的细胞核里。
  • Gene mutations are alterations in the DNA code.基因突变是指DNA密码的改变。
6 fingerprint 4kXxX     
n.指纹;vt.取...的指纹
参考例句:
  • The fingerprint expert was asked to testify at the trial.指纹专家应邀出庭作证。
  • The court heard evidence from a fingerprint expert.法院听取了指纹专家的证词。
7 scrutiny ZDgz6     
n.详细检查,仔细观察
参考例句:
  • His work looks all right,but it will not bear scrutiny.他的工作似乎很好,但是经不起仔细检查。
  • Few wives in their forties can weather such a scrutiny.很少年过四十的妻子经得起这么仔细的观察。
8 brawled 23c5a5e84bd9a95ca89b437a22999cdc     
打架,争吵( brawl的过去式和过去分词 )
参考例句:
  • The river brawled over the rapids. 河水哗哗地流过湍滩。
  • Two gangs of youths brawled on the dance floor of the ferry. 两伙青年在渡轮的舞池里打起来了。
9 gal 56Zy9     
n.姑娘,少女
参考例句:
  • We decided to go with the gal from Merrill.我们决定和那个从梅里尔来的女孩合作。
  • What's the name of the gal? 这个妞叫什么?
10 chivalry wXAz6     
n.骑士气概,侠义;(男人)对女人彬彬有礼,献殷勤
参考例句:
  • The Middle Ages were also the great age of chivalry.中世纪也是骑士制度盛行的时代。
  • He looked up at them with great chivalry.他非常有礼貌地抬头瞧她们。
11 entirely entirely     
ad.全部地,完整地;完全地,彻底地
参考例句:
  • The fire was entirely caused by their neglect of duty. 那场火灾完全是由于他们失职而引起的。
  • His life was entirely given up to the educational work. 他的一生统统献给了教育工作。
12 altruistic hzuzA6     
adj.无私的,为他人着想的
参考例句:
  • It is superficial to be altruistic without feeling compassion.无慈悲之心却说利他,是为表面。
  • Altruistic spirit should be cultivated by us vigorously.利他的精神是我们应该努力培养的。
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