Some people, in all seriousness, say that
4 ]' p( P& M: Z- ]* k0 A6 w( y$ bhumans will be living in space within the next
6 C6 B) `$ E8 B9 g, ~* rhundred or so years. Planet Earth will be crowded,/ W$ k/ ^: S5 S* q R, G4 b, G% }
dirty and lack of resources. A sort of exodus --71.9 |4 s* M9 w: t. E/ \
of mankind will begin.
- N. _. D [8 H# G0 rSpaceships will be assembled so that they
4 J0 [; s; P% G. d- ~revolve around the earth. Some may orbit around: z4 ?0 b% \4 t0 S9 v# Y$ [: {6 {4 r
Mars. These space stations will be serviced by) y; |0 E. G* r" V" Y( C* F3 ?
space buses. We saw the first space bus launch in --72.
% B7 x* H% h; @3 }- Z; hApril 1981. This was "Columbia", it made several --73.- K: V) y1 |% m1 I
orbits around the earth and then returned, landing6 E6 k: V" B- O7 q+ \; e
on a huge dry lake bed in California. "Columbia"9 W; C7 k( @2 i
will be used again. Previous spaceships have; H/ Q% ]; t. F* A) E
been abandoned, only the nose cone being used & E% {8 T$ t: Z
to bring the crews back to earth. --74.3 W' h7 S* I" f; k2 G# D* m$ J% ]
Upon established, each space station will --75.2 p! Y, O5 ~ E1 P: _, T) b
generate its own atmosphere and have its own) z7 }: K4 O" d6 R/ V
agriculture. It will need to rotation to provide --76.
2 u& [* F1 F6 A( ]* v" Q0 pan artificial gravity; people will be forced inwards --77.$ ^. t7 `4 g% O$ [9 [8 `4 K1 I7 r: Y
from the center by centrifugal force.7 p# H ?) Z* v
The moon and Mars could become new sources of
* O) L4 O: P: b! w% i: P5 lnew materials. Driving through space will no --78.* E0 @( V5 V4 v, F
longer need Earth fuel- the energy would come6 D; M5 I' z1 O+ H9 w; p; c0 c/ U
from the sun. This energy would be converted from --79.& x6 [3 B6 z3 m. ?: P! O8 |: f X% R
electricity to work magnetic rockets.
5 v) m' E* c! [7 |9 hThat all sounds quite fantastically but, with --80.
# s/ S5 i" H5 v( G5 s/ q3 @the rapid development of moderns technology, who0 |( I$ O8 T* q. \+ _; b5 O
knows about what the future holds?" ~. [7 E; R3 U% a5 ?. x& F, k& h
答案：: l: }$ H0 B/ {9 o
71. lack--short
, e2 z! K0 r2 s" v0 w* c/ I72. launch--launched
% t2 E$ A5 O# a% ^73. it--which
- v* f$ f9 f. O6 |74. crews--crew
8 y. I2 C" a4 y8 C9 |8 E3 ?75. upon--once
$ G. G, c( O r2 A1 @# W" _76. rotation--rotate
D# O" x/ T2 @: L1 w77. inwards-outwards
% \/ J- \ M2 I78. will--would
+ i7 s. I, \8 {' M+ R" F: l k79. from--into
* f' I" ~1 G0 s# B80. fantastically--fantastic |
发表于 2012-8-14 10:46:58
