英语听力文摘 English Digest 172、眼睛间谍

　　Eye spy, on this moment of science. You see at a movie's, someone is asked for identification, instead of producing a badge or picture, they simply look into a camera. Hollywood special effect department then show us lots of needle computer graphics¹. They suggest a future machine that can scan the human eye or in order to positively² identify the person. The future is after all, it seems, eye scanning devises not only exists, they are being tried out in various locations around the world.
The idea behind a iris³ scanner is just what sci-fi told us it would be. Everyone’s iris is unique, and easily distinguished⁴ by modern computers from the iris of any other person on the planet. In fact, irises⁵ are more easily distinguished than either fingerprints⁷ or signatures, both of which are used today as evidence of identity. Push your finger down too hard and you can throw off a fingerprint⁶ reading device. And it’s by no means impossible to imitate another person’s signature!
But iris scans are almost impossible to fake. As you walk toward the bank teller⁸ a camera zooms⁹ in on your torso, finds your head, then finds your eye. It snaps a picture and then breaks down the iris markings into dark areas and light areas. This data is compared with a scan you put into the computer’s memory when you opened your account. Bing! You don’t even need to swipe a card.
Some systems even check for the tell-tale contraction¹⁰ and dilation¹¹ of the iris, to prove that the eye being scanned is indeed alive.

1 graphics   

n.制图法，制图学；图形显示

参考例句：

• You've leveraged your graphics experience into the video area.你们把图形设计业务的经验运用到录像业务中去。
• Improved graphics took computer games into a new era.经改进的制图技术将电脑游戏带进了一个新时代。

2 positively   

adv.明确地，断然，坚决地；实在，确实

参考例句：

• She was positively glowing with happiness.她满脸幸福。
• The weather was positively poisonous.这天气着实讨厌。

3 iris   

n.虹膜，彩虹

参考例句：

• The opening of the iris is called the pupil.虹膜的开口处叫做瞳孔。
• This incredible human eye,complete with retina and iris,can be found in the Maldives.又是在马尔代夫，有这样一只难以置信的眼睛，连视网膜和虹膜都刻画齐全了。

4 distinguished   

adj.卓越的，杰出的，著名的

参考例句：

• Elephants are distinguished from other animals by their long noses.大象以其长长的鼻子显示出与其他动物的不同。
• A banquet was given in honor of the distinguished guests.宴会是为了向贵宾们致敬而举行的。

5 irises   

n.虹( iris的名词复数 )；虹膜；虹彩；鸢尾（花）

参考例句：

• The cottage gardens blaze with irises, lilies and peonies. 村舍花园万紫千红，鸢尾、百合花和牡丹竞相争艳。 来自《简明英汉词典》
• The irises were of flecked grey. 虹膜呈斑驳的灰色。 来自《简明英汉词典》

6 fingerprint   

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 fingerprints   

n.指纹( fingerprint的名词复数 )v.指纹( fingerprint的第三人称单数 )

参考例句：

• Everyone's fingerprints are unique. 每个人的指纹都是独一无二的。
• They wore gloves so as not to leave any fingerprints behind (them). 他们戴着手套，以免留下指纹。 来自《简明英汉词典》

8 teller   

n.银行出纳员；(选举)计票员

参考例句：

• The bank started her as a teller.银行起用她当出纳员。
• The teller tried to remain aloof and calm.出纳员力图保持冷漠和镇静。

9 zooms   

n.嗡嗡声( zoom的名词复数 )；隆隆声；（车辆等）疾驰的声音；变焦

参考例句：

• A sneeze zooms out of your mouth at over 600 m.p.h. 从你口中打出的喷嚏速度可达每小时600里。 来自互联网
• When the camera zooms in, the whole world watches out. 当镜头对准（汶川），全世界都在关注。 来自互联网

10 contraction   

n.缩略词，缩写式，害病

参考例句：

• The contraction of this muscle raises the lower arm.肌肉的收缩使前臂抬起。
• The forces of expansion are balanced by forces of contraction.扩张力和收缩力相互平衡。

11 dilation   

n.膨胀，扩张，扩大

参考例句：

• Time dilation works both ways. 时间膨胀在两方面都起作用。 来自辞典例句
• The ciliary body is an anterior dilation of the choroid at the level of the lens. 晶状体是脉络膜石晶状体平面上向前扩大的部分。 来自辞典例句