英语听力：2013-06-05 完美捕食 Perfect Predators —15

 Nothing this large would achieve powered flight until the 20th century, 65 million years later. And Quetzalcoatlus still may hold the record for flight duration.

 

Probably stay aloft for a week. Probably it could have gone for 25, 26,000 miles in a single trip. 

 

Quetzalcoatlus is one of the most unusual and terrifying carnivores to inhabit the earth. But unlike predators² such as T-Rex and Deinonychus, this flying meat eater isn’t searching for the big kill. It scours³ the earth from above, tracking the small, the young, the defenseless dinosaur⁴ hatchlings. 

 

Keeping this predator¹ airborne at altitudes as high as 10,000 feet requires a 12-meter wingspan, an accurate guidance system, and near-perfect eyesight.

 

What we see is an enlarged eyeball, an enlarged eye socket⁵, and the processing centers of the brain, the optic lobes⁶ were also very much expanded. 

 

Its 10-centimeter retina is packed with over a billion light receptors and registers as much as four times the detail of the human eye. A Quetzalcoatlus can also see a spectrum⁷ of light invisible to humans, ultraviolet. 

 

The urine of their prey⁸ absorbs U.V. rays and then reflects them back. This creates a light trail leading straight to their quarry⁹. 

 

These animals had very highly developed gaze stabilization¹⁰ mechanisms¹¹, allowing to keep their target fixed¹² and in focus, within the cross hairs, if you will, as they were moving through space. 

 

The secret to gaze stabilization is hidden in the inner ear. Three interconnected tubes form what are called semicircular canals. Fluid fills each canal, and small hairs detect the tiniest movement. As a Quetzalcoatlus’ head moves during flight, signals are sent directly to the eye muscles. The eyeballs adjust, keeping an image fixed and perfectly¹³ in focus. From 300 meters in the air, a Quetzalcoatlus can pick out a T-Rex nest and even count the...

1 predator   

n.捕食其它动物的动物；捕食者

参考例句：

• The final part of this chapter was devoted to a brief summary of predator species.本章最后部分简要总结了食肉动物。
• Komodo dragon is the largest living lizard and a fearsome predator.科摩多龙是目前存在的最大蜥蜴，它是一种令人恐惧的捕食性动物。

2 predators   

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 scours   

走遍（某地）搜寻（人或物）( scour的第三人称单数 )； （用力）刷； 擦净； 擦亮

参考例句：

• The roasting pan scours better than pot. 烤盘比锅容易擦干净。
• The best scours for UF membrane washing were 0.1%NaOH and 0.5%U10 solution consecutively washing. 0.1%NaOH 和0.5%U10溶液是理想的超滤膜清洗剂。

4 dinosaur   

n.恐龙

参考例句：

• Are you trying to tell me that David was attacked by a dinosaur?你是想要告诉我大卫被一支恐龙所攻击？
• He stared at the faithful miniature of the dinosaur.他凝视著精确的恐龙缩小模型。

5 socket   

n.窝，穴，孔，插座，插口

参考例句：

• He put the electric plug into the socket.他把电插头插入插座。
• The battery charger plugs into any mains socket.这个电池充电器可以插入任何类型的电源插座。

6 lobes   

n.耳垂( lobe的名词复数 )；（器官的）叶；肺叶；脑叶

参考例句：

• The rotor has recesses in its three faces between the lobes. 转子在其凸角之间的三个面上有凹槽。 来自辞典例句
• The chalazal parts of the endosperm containing free nuclei forms several lobes. 包含游离核的合点端胚乳部分形成几个裂片。 来自辞典例句

7 spectrum   

n.谱，光谱，频谱；范围，幅度，系列

参考例句：

• This is a kind of atomic spectrum.这是一种原子光谱。
• We have known much of the constitution of the solar spectrum.关于太阳光谱的构成，我们已了解不少。

8 prey   

n.被掠食者，牺牲者，掠食；v.捕食，掠夺，折磨

参考例句：

• Stronger animals prey on weaker ones.弱肉强食。
• The lion was hunting for its prey.狮子在寻找猎物。

9 quarry   

n.采石场；v.采石；费力地找

参考例句：

• Michelangelo obtained his marble from a quarry.米开朗基罗从采石场获得他的大理石。
• This mountain was the site for a quarry.这座山曾经有一个采石场。

10 Stabilization   

稳定化

参考例句：

• The position of barycentre on plane directly impacts the stabilization and manipulation of plane. 飞机重心位置直接影响飞机的稳定和操纵特性。
• With the higher olefins, stabilization of the energetic intermediates occurs more easily. 在较高的烯烃情况下，高能的中间物稳定作用更易出现。

11 mechanisms   

n.机械( mechanism的名词复数 )；机械装置；[生物学] 机制；机械作用

参考例句：

• The research will provide direct insight into molecular mechanisms. 这项研究将使人能够直接地了解分子的机理。 来自《简明英汉词典》
• He explained how the two mechanisms worked. 他解释这两台机械装置是如何工作的。 来自《简明英汉词典》

12 fixed   

adj.固定的，不变的，准备好的；(计算机)固定的

参考例句：

• Have you two fixed on a date for the wedding yet?你们俩选定婚期了吗？
• Once the aim is fixed,we should not change it arbitrarily.目标一旦确定，我们就不应该随意改变。

13 perfectly   

adv.完美地，无可非议地，彻底地

参考例句：

• The witnesses were each perfectly certain of what they said.证人们个个对自己所说的话十分肯定。
• Everything that we're doing is all perfectly above board.我们做的每件事情都是光明正大的。