               Unit 8

Text
    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 Earth's 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 man's 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 Earth's 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 haven't even said them all.

            New Words
    virtually
ad. almost

    someday
ad. at some uncertain future time гһ

    underground
a.  below the surface of the earth; secret µģܵ
ad. under the earth's surface; secretly

    manmade
a.  produced by people; not existing in nature

    palatable
a.  agreeable to the taster or (fig.) to the mind; acceptable ɿڵģܻӭ

    association
n.  an idea or object connected with another idea in thought 

    legend 
n.  an old story handed down from the past, esp. one of doubtful truth ˵

    spirit
jn. 飻

    location
n.  a place or position λ

    afterlife
n.  the life after death as is believed by some people 

    torment
n.  sever pain or suffering in mind or body ʹࣻĥ

    volcanic
a.  of, like, produced or caused by a volcano

    eruption
n.  outbreak of a volcano; (an example of) the action of erupting ɽ

    hellish
a.  like hell, horrible, devilish

    noxious
harmful to people, plants, or animals кģж

    mankind
n. the human race 

    downward
ad. towards a lower level or position

    outermost 
a.  farthest from the inside or center

    crust
n.  ؿ

    honeycomb
vt. fill with holes, tunnels, etc. ʹɷ״

    gigantic
a.  huge, enormous; of or like a giant ޴ģӴ

    ant
n.  

    fog
n.  very thick mist

    variation
n.  the action of varying; an example or degree of varying 仯

    equable
a.  steady; not changing much ȶ

    constant
a.  unchanging; fixed 

    simplify
vt. make simple; make easy to do or understand

    earthquake 
n.  sudden and violent movements of the earth's surface 

    tyranny
n.  the cruel or unjust use of power to rule a person or country ר

    vary
v.  (cause to) the different 仯

    variable
a.  likely to vary; not steady ױ
n.  sth. which can vary in quantity or size 

    externally
ad. outside

    external a.

    artifical
a.  not natural or real; manmade

    adjust
vt. set right; change slightly, esp. in order to make suitable for a particular job or new conditions 

    convenience
n.  personal comfort or advantage; the quality of being convenient 

    convenient a.

    stoke
n.  sound made by a bell striking the hours 

    community
n.  the people living in a particular area considered as a whole; the area itself 

    endeavo(u)r
n.  effort, attempt Ŭ
vt. ͼ

    mobile 
a.  movable; able to move, or be moved, quickly and easily 

    entail 
vt. make (an event or action) necessary ʹΪ

    jet
n.  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 䣻ʽɻ

    lag
n.  falling behind; interval between two related events, processes, etc. ͺ󣻣¼ȵģ

    jet lag
   ʱ˷ɻкģʱӦ

    coast
n.  the land on or close to the edge of the sea 

    gear
vt. adjust, adapt,; connect by gears
n.  ֣ȵģŵ

    stabilize
v.  (cause to) become firm, steady, or unchanging; (cause to) keep in balance ʹȶʹƽ

    extent
n.  degree; length; area; range ̶ȣΧ

    encumber 
vt. crowd, fill up; hinder, hamper the function of 

    recreation
n.  play or amusement 

    deprive
vt. take away from; prevent from using or enjoying 

    species
n.  

    habitat
n.  natural home of a plant or an animal أϢ

    involuntarily
ad. carried out without one's conscious wishes, unintentionally Ծأʶ

    rat
n.  

    roach
n.  

    burrow
v.  dig a hole in the ground 򣨵ض
n.  a hole made in the ground (by foxes, rabbits, etc.)

    forestry
n.  forest land; science of planting and caring for forests ֵأѧ

    terminal
n.  a place or set of buildings for the use of passengers յվ

    air terminal
n.  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 յվռɢվ

    occupation
n.  the act of occupying or the state or period of being occupied

    elaborate
a.  worked out with great care; complicated ģӵ

    visualize
vt. form a picture of (sb. or sth.) in the mind; imagine 

    visual 
a.  of or gained by seeing Ӿ

    derive
vi. come (from); originate ԣԴڣ
vt. get
 
    hydroponic
a.  ҺѧģˮԷ

    illuminate
vt. give light to; throw light on 

    wilderness
n.  wild uncultivated waste land Ұ

    stability
n.  the quality or state of being stable ȶԣ

    withdraw (withdrew, withdrawn)
v.  move back or away; take out or away ˣ
    withdrawal
n.  withdrawing or being withdrawn

    condition
vt. bring into a desired state or condition ʹ״̬

    greenery
n.  green leaves or plants ľ

    countryside
n.  land outside the cities and towns; country area ũ

    horizontally
ad. ˮƽ

    horizontal a.

    pavement
n.  (BrE) a paved surface or path a street for people to walk on, (AmE) the paved surface of a street Ӣе ̹ĵ·

    suburban
a.  of or in a suburb 

    sprawl
n.  a widespread untidy area, esp. of buildings ɢҵĽ

    underworld
n.  a region underground

    culture
n.  ideas, customs and art shared by a particular society; a particular society or civilization Ļ

    intense
a.  (of qualities) high in degree ǿҵ
    restrict
vt. keep within limits 

    dweller
n.  a person or animal that lives (in the stated place); inhabitant ס

    repulsive 
a.  very unpleasant; causing strong dislike and fear 

         Phrases & Expressions
  expose to
  leave no longer covered or protected ʹ¶

  in the open
  ڻ⣬Ұ

  add to 
  increase 

  on the stoke
  at exactly the time stated or agree upon ׼

  at first thought
  when considered for the first էһ

  to a certain extent
  partly, to a certain degree һ̶

  take up
  occupy (space, time, etc.) ռ

  deprive of
  take away from; prevent from using or having 

  mind you
  (used as an interj.) please note, take this fact into account ţע

  derive from
  come from; obtain from ԣԴڣӡõ
  turn over
  give (to sb.) for use or care ƽ

  get away from
  succeed in leaving; escape 뿪




    
    
  
