大学英语精读：第五册 UNIT 8

Roaming the Cosmos

by Le0on Jaroff

　　Darkness has fallen on Cambridge, England, and on a damp and chilly evening king's Parade is filled with students and faculty. Then, down the crowded thoroughfare comes the University of Cambridge's most distinctive vehicle, bearing its most distinguished citizen. In the motorized wheelchair, boyish face dimly illuminated by a glowing computer screen attached to the left armrest, is Stephen William Hawking, 46, one of the world's greatest theoretical physicists. As he skillfully maneuvers through the crowd, motorists slow down, some honking their horns in greeting. People wave and shout hello.

　　A huge smile lights up Hawking's bespectacled face, but he cannot wave or shout back. Since his early 20s, he has suffered from amyotrophic lateral sclerosis （ALS）, a progressive deterioration of the central nervous system that usually causes death within three or four years. Hawking's illness has advanced more slowly, and now seems almost to have stabilized. Still, it has robbed him of virtually all movement. He has no control over most of his muscles, cannot dress or eat by himself and has lost his voice. Now he "speaks" only by using the slight voluntary movement left in his hands and fingers to operate his wheelchair's built-in computer and voice synthesizer.

　　While ALS has made Hawking a virtual prisoner in his own body, it has left his courage and humor intact, his intellect free to roam. And roam it does, from the infinitesimal to the infinite, from the subatomic realm to the far reaches of the universe. In the course of these mental expeditions, Hawking has conceived startling new theories about black holes and the disorderly events that immediately followed the Big Bang from which the universe sprang. More recently, he has shaken both physicists and theologians by suggesting that the universe has no boundaries, was not created and will not be destroyed.

　　Most of Stephen Hawking's innovative thinking occurs at Cambridge, where he is Lucasian professor of mathematics, a seat once occupied by Isaac Newton. There, in the Department of Mathematics and Theoretical Physics, he benevolently reigns over the relativity group, 15 overachieving graduate students from nine countries. On his office door is a small plaque irreverently reading QUIET, PLEASE. THE BOSS IS ASLEEP.

　　Hardly. From midmorning until he departs for dinner around 7 p. m., Hawking follows a routine that would tax the most able-bodied, working in his book-lined office, amid photographs of his wife Jane and their three children. When he rolled into the department's common room one morning last month, his students were talking shop around low tables. Maneuvering to one of the tables, Hawking clicked his control switch, evoking tiny beeps from his computer and selecting words from lists displayed on his screen. These words, assembled in sequence at the bottom of the screen, finally issued from the voice synthesizer: "Good morning. Can I have coffee?" Then, for the benefit of a visitor: "I am sorry about my American accent." （The synthesizer is produced by a California company.）

　　When the conversation shifted to creativity and how mathematicians seem to reach a creative peak in their early 20s, Hawking's computer beeped. "I'm over the hill," he said, to a chorus of laughter.

　　Hawking was born on Jan. 8, 1942-300 years to the day, he often notes, after the death of Galileo. As a small boy, he was slow to learn to read but liked to take things apart though he confesses that he was never very good at putting things back together. When he was twelve, he recalls humorously, "one of my friends bet another friend a bag of sweets that I would never come to anything. I don't know if this bet was ever settled and, if so, who won.

　　Fascinated by physics, Stephen concentrated in the subject at Oxford's University College, but did not distinguish himself. He partied, took a great interest in rowing and studied only an hour or so a day. Moving on to Cambridge for graduate work in relativity, he found the going rough, party because of some puzzling physical problems; he stumbled frequently and seemed to be getting clumsy.

　　Doctors soon gave him the bad news: he had ALS, it would only get worse, and there was no cure. Hawking was overwhelmed. Before long, he needed a cane to walk, was drinking heavily and ignoring his studies. "There didn't seem to be much point in completing my Ph. D.," he says.

　　Then Hawking's luck turned. The progress of the disease slowed, and Einsteinian space-time suddenly seemed less formidable. But what really made the difference, he says, "was that I got engaged to Jane," who was studying modern languages at Cambridge. "This gave me something to liver for." As he explains, "if we were to get married, I had to get a job. And to get a job, I had to finish my Ph. D. I started, working hard for the first time in my life. To my surprise, I found I liked it."

　　What particularly interested Stephen was singularities, strange beasts predicted by general relativity. Einstein's equations indicated that when a star several times larger than the sun exhausts its nuclear fuel and collapses, its matter crushes together at its center with such force that it forms a singularity, an infinitely dense point with no dimensions and irresistible gravity. A voluminous region surrounding the singularity becomes a "black hole," from which —— because of that immense gravity —— nothing, not even light, can escape.

　　Scientists years ago found compelling evidence that black holes exist, but they were uncomfortable with singularities, because all scientific laws break down at these points. Most physicists believed that in the real universe the object at the heart of a black hole would be small （but not dimensionless） and extremely dense （but not infinitely so）. Enter Hawking. While still a graduate student, he and Mathematician Roger Penrose developed new techniques proving mathematically that if general relativity is correct, singularities must exist. Hawking went on to demonstrate - again if general relativity is correct - that the entire universe must have sprung from a singularity. As he wrote in his 1966 Ph. D. thesis, "There is a singularity in our past."

　　Stephen later discerned several new characteristics of black holes and demonstrated that the amazing forces of the Big Bang would have created mini-black holes, each with a mass about that of a terrestrial mountain, but no larger than the subatomic proton. Then, applying the quantum theory （which accurately describes the random, uncertain subatomic world） instead of general relativity （which, it turns out, falters in that tiny realm）, Hawking was startled to find that the mini-black holes must emit particles and radiation. Even more remarkable, the little holes would gradually evaporate and, 10 billion years or so after their creation, explode with the energy or millions of H-bombs.

　　Hawking has visited the U. S. 30 times, made seven trips to Moscow, taken a round-the-word journey, and piloted his wheelchair on the Great Wall of China. On the road, the activities occasionally deviate somewhat from physics. One night Stephen accompanied a group to a Chicago discotheque, where he joined in the festivities by wheeling onto the dance floor and spinning his chair in circles.

　　Recently, Hawking, who has no qualms about recanting his own work if he decides he was wrong, may have transcended his famous proof that singularities exist. With Physicist James Hartle. He has derived a quantum wave describing a self-contained universe that, like the earth's surface, has no edge or boundary. If that is the case, says Hawking, Einstein's general theory of relativity would have to be modified, and there would be no singularities. "The universe would not be created, not be destroyed; it would simply be," he concludes, adding challengingly, "What place, then, for a Creator?"

　　NEW WORDS

　　roam

　　v. go from one place to another without a goal or purpose; wander 漫游

　　cosmos

　　n. the whole universe considered as an ordered system 宇宙

　　cosmic

　　a.

　　damp

　　a. slightly wet; moist

　　chilly

　　a. rather cold; unpleasantly cold

　　chill

　　n.

　　faculty

　　n. all the teachers of a school or college

　　thoroughfare

　　n. a busy main road 通衢

　　distinguished

　　a. showing remarkable qualities 杰出的

　　boyish

　　a. of or like a boy

　　dimly

　　ad. faintly; unclearly 黯淡地

　　glow

　　vi. give off a steady light; shine 发光

　　armrest

　　n. a support for the arm, esp. one on the chair or couch 扶手

　　motorist

　　n. a person who drives or rides in an automobile

　　physicist

　　n. a person who studies or works in physics

　　honk

　　n. the sound made by a wild goose or an automobile horn

　　greeting

　　n. an act or expression of welcome or salutation 欢迎;致意

　　bespectacled

　　a. wearing glasses

　　amyotrophic lateral sclerosis

　　肌萎缩性脊髓侧索硬化

　　deterioration

　　n. the act or process of deteriorating 恶化

　　deteriorate

　　vi. become worse

　　rob

　　vt. take from unlawfully, esp. by force 抢劫;使丧失

　　voluntary

　　a. controlled by the will; made, done, or a given of one's own free will 随意的;自愿的;志愿的

　　built-in

　　a. forming a part of sth. that cannot be separated from it

　　synthesizer

　　n. an electrical instrument that can produce many different sorts of sound 音响合成器

　　voice synthesizer

　　语音合成器

　　synthesis

　　n. the combining of separate things, ideas, etc., into a complete whole 合成

　　humor

　　n. the quality of being amusing or funny; the ability to see or express what is funny 幽默（感）

　　intellect

　　n. the ability to think, reason, and learn; intelligence

　　infinitesimal

　　n. a. 无穷小（的）

　　subatomic

　　a. smaller than an atom 亚原子的

　　expedition

　　n. a long trip for exploring or studying sth. 远征;探险;考察

　　disorderly

　　a. combining lacking organization or order; untidy

　　theologian

　　n. a person who has studied theology 神学家

　　boundary

　　n. a dividing line between one place or thing and another; border

　　innovative

　　a. tending or liking to introduce new ideas or methods; different from, and esp. better than previous ones 创新的

　　innovation

　　n.

　　benevolently

　　ad. in a kindly manner 仁慈地

　　reign

　　v. rule, esp. as a monarch 统治

　　relativity

　　n. 相对论

　　overachieve

　　v. do or perform better than expected

　　graduate

　　n. one who has graduated, esp. from a college or university, holding a bachelor's degree

　　graduate student

　　研究生

　　plaque

　　n. a flat decorative metal or stone plate, that is fixed to a wall, statue, etc. 饰板，匾

　　irreverently

　　ad. in a disrespectful manner 不敬地

　　midmorning

　　n. the middle of the morning

　　able-bodied

　　a. strong and healthy; physically fit

　　book-lined

　　a. lined with books

　　amid

　　prep. in the middle of; among

　　common room

　　a room in a school or college for the use of teachers and / or students when they are not teaching or studying 公共休息室

　　click

　　vt. strike or move with a sight short sound

　　evoke

　　vt. produce; call up 产生；唤起

　　beep

　　n. a sharp, short sound

　　chorus

　　n. sth. said or shouted by many people together

　　confess

　　v. say that sth. is true; say that one has committed a crime or done sth. wrong 承认；坦白

　　fascinate

　　vt. attract or interest very strongly 强烈地吸引；迷住

　　party

　　vt. enjoy oneself, esp. at a party or parties

　　overwhelm

　　vt. overcome completely; overpower 征服，制服

　　cane

　　n. a stick used to help in walking 手杖

　　formidable

　　a. difficult to defeat or deal with; frightening 难对付的；可怕的

　　engaged

　　a. having agreed to get married 已订婚的

　　singularity

　　n. a hypothetical point in space at which an object becomes compressed to infinite density and infinitesimal volume 奇点

　　beast

　　n. any （four-footed） animal; a person or thing felt to be hateful or offensive

　　nuclear

　　a. of a nucleus, esp. of an atom 核的，原子核的

　　crush

　　vt. squeeze together violently so as to break

　　vi. become crushed

　　infinitely

　　ad. without limits of any kind; having no end

　　dense

　　a. packed closely together; thick

　　dimension

　　n. the measurement of the length, width, or height of sth. 尺寸

　　dimensionless

　　a.

　　irresistible

　　a. that cannot be resisted; too great to be withstood

　　voluminous

　　a. very large

　　compelling

　　a. strongly convincing or persuasive

　　thesis

　　n. a long piece of writing on a particular subject, based on original work and written for a higher degree 论文

　　amazing

　　a. causing great surprise or wonder, esp. because of quantity or quality

　　amaze

　　vt.

　　mini-

　　prefix. very small compared with others of its kind

　　terrestrial

　　a. of the planet earth

　　proton

　　n. a tiny particle of an atom that has a positive electric charge 质子

　　quantum

　　n. the basic unit of radiant energy; the smallest amount of energy capable of existing independently 量子

　　accurately

　　ad. precisely; exactly

　　accurate

　　a.

　　random

　　a. without plan, purpose, or pattern 任意的，随机的

　　uncertain

　　a. not certain; likely to change

　　falter

　　vi. move or speak in an unsteady way; lose strength or effectiveness; fail

　　radiation

　　n. the process of sending out rays of energy, such as heat or light; sth. that is radiated 辐射；放射物

　　radiate

　　v.

　　evaporate

　　v. change from a liquid into a vapor or gas 蒸发

　　explode

　　vi. burst with a loud noise; blow up

　　H-bomb

　　n. a hydrogen bomb

　　pilot

　　vt. act as a pilot; guide; lead 驾驶（飞行器等）；指引；引导

　　deviate

　　vi. move away from a usual or accepted standard of behavior 偏离

　　accompany

　　vt. go along with

　　discotheque

　　n. （formal for disco） a club where people dance to recorded music 迪斯科舞厅

　　festivity

　　n. the act of rejoicing; merriment; gaiety 欢庆（活动）

　　spin

　　v. （cause to） turn quickly about an axis

　　recant

　　vt. say publicly that one no longer holds （a former belief）

　　self-contained

　　a. complete in itself; independent

　　creator

　　n. a person who creates; （C） God

　　PHRASES & EXPRESSIONS

　　light up

　　make or become bright, cheerful, etc.

　　rob of

　　take the property of, esp. using violence; prevent from enjoying

　　reign over

　　rule as the king or queen

　　talk shop

　　（inf.） talk about things in one's work or trade

　　in sequence

　　one following another; in succession

　　over the hill

　　past one's prime, unable to function as one used to

　　put together

　　form by combining parts or members; assemble

　　come to anything

　　end in success / failure

　　something / nothing

　　distinguish oneself

　　behave or perform noticeably well

　　（be） engaged to

　　having agreed to marry

　　to sb's surprise

　　in a way that surprises sb.

　　break down

　　become unusable; fall

　　deviate from

　　move away from

　　PROPER NAMES

　　Leon Jaroff

　　利昂.贾洛夫

　　Cambridge

　　剑桥（大学）

　　King's Parade

　　国王阅兵场

　　Stephen William Hawking

　　斯蒂芬.威廉.霍金

　　Lucasian

　　卢卡斯的

　　Isaac Newton

　　艾萨克.牛顿

　　California

　　加利福尼亚（州）

　　Oxford

　　牛津（大学）

　　Jane

　　简

　　Roger Penrose

　　罗杰.彭罗斯

　　Moscow

　　莫斯科

　　Chicago

　　芝加哥

　　James Hartle

　　詹姆斯.哈特尔