大學英語精讀文本第4冊Unit 8.doc

Unit 8Text Would you choose to live underground if you could gain many advantages from doing so? Weather would no longer trouble you. Temperature would remain the same all the year round. Artificial lighting could make the rhythm of our life uniform everywhere. And the ecology of the natural world above ground would be greatly improved. Still, the prospect of moving underground may not be appealing to many people. THE NEW CAVES Isaac Asimov During the ice ages, human beings exposed to the colder temperatures of the time would often make their homes in caves. There they found greater comfort and security than they would have in the open. We still live in caves called houses, again for comfort and security. Virtually no one would willingly sleep on the ground under the stars. Is it possible that someday we may seek to add further to our comfort and security by building our houses underground - in new, manmade caves? It may not seem a palatable suggestion, at first though. We have so many evil associations with the underground. In our myths and legends, the underground is the realm of evil spirits and of the dead, and is often the location of an afterlife of torment. (This may be because dead bodies are buried underground, and because volcanic eruptions make the underground appear to be a hellish place of fire and noxious gases.) Yet there are advantages to underground life, too, and something to be said for imagining whole cities, even mankind generally, moving downward; of having the outermost mile of the Earths crust honeycombed with passages and structures, like a gigantic ant hill. First, weather would no longer be important, since, it is primarily a phenomenon of the atmosphere. Rain, snow, sleet, fog would not trouble the underground world. Even temperature variations are limited to the open surface and would not exist underground. Whether day or night, summer or winter, temperatures in the underground world remain equable and nearly constant. The vast amounts of energy now expended in warming our surface surroundings when they are too cold, and cooling them when they are too warm, could be saved. The damage done to manmade structures and to human beings by weather would be gone. Transportation over local distances would be simplified. (Earthquakes would remain a danger, of course.) Second, local time would no longer be important. On the surface, the tyranny of day and night cannot be avoided, and when it is morning in one place, it is noon in another, evening in still another and midnight in yet another. The rhythm of human life therefore varies from place to place. Underground, where there is no externally produced day, but only perpetual darkness, it would be arificial lighting that produces the day and this could be adjusted to suit mans convenience. The whole world could be on eight-hour shifts, starting and ending on the stroke everywhere, at least as far as business and community endeavors were concerned. This could be important in a freely mobile world. Air transportation over long distances would no longer have entail jet lag. Individuals landing on another coast or another continent would find the society they reached geared to the same time of day as at home. Third, the ecological structure could be stabilized. To a certain extent, mankind encumbers the Earth. It is not only his enormous numbers that take up room; more so, it is all the structures he builds to house himself and his machines, to make possible his transportation and communication, to offer him rest and recreation. All these things distort the wild, depriving many species of plants and animals of their natural habitat - and sometimes, involuntarily, favoring a few, such as rats and roaches. If the works of man were removed below ground - and, mind you, below the level of the natural world of the burrowing animals man would still occupy the surface with his farms, his forestry, his observation towers, his air terminals and so on, but the extent of that occupation would be enormously decreased. Indeed, as one imagines the underground world to become increasingly elaborate, one can visualize much of the food supply eventually deriving from hydroponic growth in artificially illuminated areas underground. The Earths surface might be increasingly turned over to park and to wilderness, maintained at ecological stability. Fourth, nature would be closer. It might seem that to withdraw underground is to withdraw from the natural world, but would that be so? Would the withdrawal be more complete than it is now, when so many people work in city buildings that are often windowless and artificially conditioned? Even where there are windows, what is the prospect one views (if one bothers to) but sun, sky, and buildings to the horizon - plus some limited greenery? And to get away from the city now? To reach the real countryside? One must travel horizontally for miles, first across city pavements and then across suburban sprawls. In an underworld culture, the countryside would be right there, a few hundred yards above the upper level of the cities - wherever you are. The surface would have to be protected from too frequent, or too intense, or too careless visiting, but however carefully restricted the upward trips might be, the chances are that the dwellers of the new caves would see more greenery, under ecologically healthier conditions, than dwellers of surface cities to today. However odd and repulsive underground living may seem at first thought, there are tings to be said for it - and I havent even said them all. New Words virtuallyad. almost somedayad. at some uncertain future time 有朝一日 undergrounda. below the surface of the earth; secret 地下的；秘密的ad. under the earths surface; secretly manmadea. produced by people; not existing in nature palatablea. agreeable to the taster or (fig.) to the mind; acceptable 可口的；受歡迎的 associationn. an idea or object connected with another idea in thought 聯(lián)想 legend n. an old story handed down from the past, esp. one of doubtful truth 傳說；傳奇 spiritjn. 神靈；鬼怪 locationn. a place or position 場所，位置 afterlifen. the life after death as is believed by some people 來世 tormentn. sever pain or suffering in mind or body 痛苦；折磨 volcanica. of, like, produced or caused by a volcano eruptionn. outbreak of a volcano; (an example of) the action of erupting （火山）爆發(fā) hellisha. like hell, horrible, devilish noxiousharmful to people, plants, or animals 有害的，有毒的 mankindn. the human race 人類 downwardad. towards a lower level or position outermost a. farthest from the inside or center crustn. 地殼 honeycombvt. fill with holes, tunnels, etc. 使成蜂窩狀 gigantica. huge, enormous; of or like a giant 巨大的，龐大的 antn. 螞蟻 fogn. very thick mist variationn. the action of varying; an example or degree of varying 變化 equablea. steady; not changing much 穩(wěn)定的 constanta. unchanging; fixed 永桓的 simplifyvt. make simple; make easy to do or understand earthquake n. sudden and violent movements of the earths surface 地震 tyrannyn. the cruel or unjust use of power to rule a person or country 專制 varyv. (cause to) the different 變化 variablea. likely to vary; not steady 易變的n. sth. which can vary in quantity or size 變量 externallyad. outside external a. artificala. not natural or real; manmade adjustvt. set right; change slightly, esp. in order to make suitable for a particular job or new conditions 調(diào)整；調(diào)節(jié) conveniencen. personal comfort or advantage; the quality of being convenient 便利，方便 convenient a. stoken. sound made by a bell striking the hours 鐘鳴聲 communityn. the people living in a particular area considered as a whole; the area itself 社區(qū)（居民） endeavo(u)rn. effort, attempt 努力vt. 試圖 mobile a. movable; able to move, or be moved, quickly and easily 活動的 entail vt. make (an event or action) necessary 使成為必需 jetn. a narrow stream or streams of liquid, gas, etc. coming forcefully out of a small hole; any aircraft that is pushed through the air by a jet engine 噴射；噴氣式飛機 lagn. falling behind; interval between two related events, processes, etc. 滯后；（事件等的）間隔 jet lag （長時間乘飛機旅行后產(chǎn)生的）時差反應(yīng) coastn. the land on or close to the edge of the sea 海岸；海濱 gearvt. adjust, adapt,; connect by gearsn. 齒輪；（汽車等的）排檔 stabilizev. (cause to) become firm, steady, or unchanging; (cause to) keep in balance 使穩(wěn)定；使平衡 extentn. degree; length; area; range 程度，范圍 encumber vt. crowd, fill up; hinder, hamper the function of 塞滿，妨礙 recreationn. play or amusement 娛樂 deprivevt. take away from; prevent from using or enjoying 剝奪 speciesn. 物種 habitatn. natural home of a plant or an animal 產(chǎn)地；棲息 involuntarilyad. carried out without ones conscious wishes, unintentionally 不自覺地；無意識地 ratn. 鼠 roachn. 蟑螂 burrowv. dig a hole in the ground 打（地洞）n. a hole made in the ground (by foxes, rabbits, etc.) forestryn. forest land; science of planting and caring for forests 林地；林學 terminaln. a place or set of buildings for the use of passengers 終點站 air terminaln. a building at an airport for boarding and discharging passengers from aircraft; a bus station in center of a town for passengers going to or arriving from an airport 航空終點站；航空集散站 occupationn. the act of occupying or the state or period of being occupied elaboratea. worked out with great care; complicated 精心制作的；復雜的 visualizevt. form a picture of (sb. or sth.) in the mind; imagine 想像 visual a. of or gained by seeing 視覺的 derivevi. come (from); originate 來（自），起源（于）vt. get hydroponica. 溶液培養(yǎng)（學）的；水栽法的 illuminatevt. give light to; throw light on 照亮，照明 wildernessn. wild uncultivated waste land 荒野 stabilityn. the quality or state of being stable 穩(wěn)定（性） withdraw (withdrew, withdrawn)v. move back or away; take out or away 撤退，撤回 withdrawaln. withdrawing or being withdrawn conditionvt. bring into a desired state or condition 使處于良好狀態(tài) greeneryn. green leaves or plants 草木 countrysiden. land outside the cities and towns; country area 農(nóng)村 horizontallyad. 水平地 horizontal a. pavementn. (BrE) a paved surface or path a street for people to walk on,