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

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.

1 hummingbird   

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   

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   

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   

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。