英语听力文摘 English Digest 204、纳米机器人

　　Robot Attack
“纳米机器人”的研制属于分子仿生学的范畴，它根据分子水平的生物学原理为设计原型，设计制造可对纳米空间进行操作的“功能分子器件”。纳米生物学的近期设想，是在纳米尺度上应用生物学原理，发现新现象，研制可编程的分子机器人，也称纳米机器人。合成生物学对细胞信号传导与基因调控网络重新设计，开发“在体”（in vivo）或“湿”的生物计算机或细胞机器人，从而产生了另种方式的纳米机器人技术。
Nanotechnology scientists dream of some day creating robots the size of molecules¹, or even turning molecules into machines that could roam the human body and perform all sorts of useful tasks.

　　But some nanotechnology theorists and science fiction aficionados² imagine a more ominous³ possibility. What if one of these tiny robots was given the ability to self-replicate?
All it would take is a single malfunction⁴ and the robots would consume everything in the galaxy⁵ as they multiply out of control until all that was left was a shapeless, robotic mass called “grey goo.” Now, before you go heading for the hills with a year’s supply of water and a survival guide, understand that the death-by-robot scenario⁶ is just that–a scenario, and a pretty fanciful one to boot.
First, we’re nowhere near the point of being able to create a self-replicating nano-machine. But even if such machines do one day exist, they would have a hard time taking over the universe for one simple reason: fuel.
Even microscopic⁷ machines need an energy source. Inorganic⁸ matter like rocks and minerals wouldn’t do the trick because they just don’t contain stuff that the machines could break down and use for power.
But what if a mad scientist created a robot that fed on organic materials like sunlight and living things? Not to worry. Natural life forms have had around four billion years of training to compete for resources; the killer⁹ robots probably wouldn’t stand much of a chance against such streamlined competitors. Plus, if the robots were made from organic materials, they might be preyed¹⁰ on by bacteria or other predators¹¹.

1 molecules   

分子( molecule的名词复数 )

参考例句：

• The structure of molecules can be seen under an electron microscope. 分子的结构可在电子显微镜下观察到。
• Inside the reactor the large molecules are cracked into smaller molecules. 在反应堆里，大分子裂变为小分子。

2 aficionados   

n.酷爱…者，…迷( aficionado的名词复数 )； 爱看斗牛的人

参考例句：

• West Coast aficionados of postwar coffee-shop architecture(Karal Ann Marling) 西海岸战后咖啡店式建筑的狂热追随者（卡拉尔安马林） 来自互联网
• Clay developed a radical style which appalled boxing aficionados. 克莱发展出一种震惊拳击迷的全新风格。 来自互联网

3 ominous   

adj.不祥的，不吉的，预兆的，预示的

参考例句：

• Those black clouds look ominous for our picnic.那些乌云对我们的野餐来说是个不祥之兆。
• There was an ominous silence at the other end of the phone.电话那头出现了不祥的沉默。

4 malfunction   

vi.发生功能故障，发生故障，显示机能失常

参考例句：

• There must have been a computer malfunction.一定是出了电脑故障。
• Results have been delayed owing to a malfunction in the computer.由于电脑发生故障，计算结果推迟了。

5 galaxy   

n.星系；银河系；一群(杰出或著名的人物)

参考例句：

• The earth is one of the planets in the Galaxy.地球是银河系中的星球之一。
• The company has a galaxy of talent.该公司拥有一批优秀的人才。

6 scenario   

n.剧本，脚本；概要

参考例句：

• But the birth scenario is not completely accurate.然而分娩脚本并非完全准确的。
• This is a totally different scenario.这是完全不同的剧本。

7 microscopic   

adj.微小的，细微的，极小的，显微的

参考例句：

• It's impossible to read his microscopic handwriting.不可能看清他那极小的书写字迹。
• A plant's lungs are the microscopic pores in its leaves.植物的肺就是其叶片上微细的气孔。

8 inorganic   

adj.无生物的；无机的

参考例句：

• The fundamentals of inorganic chemistry are very important.无机化学的基础很重要。
• This chemical plant recently bought a large quantity of inorganic salt.这家化工厂又买进了大量的无机盐。

9 killer   

n.杀人者，杀人犯，杀手，屠杀者

参考例句：

• Heart attacks have become Britain's No.1 killer disease.心脏病已成为英国的头号致命疾病。
• The bulk of the evidence points to him as her killer.大量证据证明是他杀死她的。

10 preyed   

v.掠食( prey的过去式和过去分词 )；掠食；折磨；（人）靠欺诈为生

参考例句：

• Remorse preyed upon his mind. 悔恨使他内心痛苦。 来自《现代英汉综合大词典》
• He had been unwise and it preyed on his conscience. 他做得不太明智，这一直让他良心不安。 来自辞典例句

11 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》