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VOA常速英语2008年-Hummingbird 'Screech' Mystery Solved

时间：2008-03-14 02:01:29

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（单词翻译）

By Paul Sisco
Washington
05 March 2008
 

Hummingbirds2 are among the most fascinating creatures in the avian world. The male Anna hummingbird1, the most common on the U.S. west coast, makes a high-pitched chirp3, or screech4, when it dives to guard its nest. But it doesn't use its voice.  How it makes that sound has been a mystery until now. Two young researchers at the University of California have solved it, using a clarinet, the bird's tail feathers and a wind tunnel.  VOA's Paul Sisco explains.
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1 hummingbird BcjxW     
n.蜂鸟
参考例句：
  • The hummingbird perches on a twig of the hawthorn.小蜂鸟栖在山楂树枝上。
  • The hummingbird is the only bird that can fly backward.蜂鸟是唯一能倒退向后飞的鸟。
2 hummingbirds 86894f7ac4de81bc2d81331e9759a43b     
n.蜂鸟( hummingbird的名词复数 )
参考例句：
  • Hummingbirds have discovered that nectar and pollen are very nutritious. 蜂鸟发现花蜜和花粉是很有营养的。
  • Why do hummingbirds and gorillas both have backbones? 为什么蜂鸟和大猩猩都有脊骨？
3 chirp MrezT     
v.(尤指鸟)唧唧喳喳的叫
参考例句：
  • The birds chirp merrily at the top of tree.鸟儿在枝头欢快地啾啾鸣唱。
  • The sparrows chirp outside the window every morning.麻雀每天清晨在窗外嘁嘁喳喳地叫。
4 screech uDkzc     
n./v.尖叫；(发出)刺耳的声音
参考例句：
  • He heard a screech of brakes and then fell down. 他听到汽车刹车发出的尖锐的声音,然后就摔倒了。
  • The screech of jet planes violated the peace of the afternoon. 喷射机的尖啸声侵犯了下午的平静。

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