Some people, in all seriousness, say that- k- [6 k1 V; h) @8 ?' ?
humans will be living in space within the next. M8 ]3 N' X" n5 N( a
hundred or so years. Planet Earth will be crowded,: r* a7 a. J: H5 X
dirty and lack of resources. A sort of exodus --71.
) l. Y! @" q" x2 C& B, P1 G$ ](移居) of mankind will begin.# ?1 _0 [/ L* F, f! G- t
Spaceships will be assembled so that they
! `9 Y) V' ?) A; y! Srevolve around the earth. Some may orbit around
# g# ]/ k; U# `( sMars. These space stations will be serviced by. t& a7 K/ Y* D
space buses. We saw the first space bus launch in --72.
& g. w" M% j, h, P% g4 y, ]2 S/ rApril 1981. This was "Columbia", it made several --73.
" X) g* F: v! [orbits around the earth and then returned, landing8 e) o' \+ K# M- h
on a huge dry lake bed in California. "Columbia"
! o w$ F6 x5 ~will be used again. previous spaceships have
# w2 k+ |, z7 i$ R* d8 }! {been abandoned, only the nose cone being used
# g6 \4 B7 R+ c* Pto bring the crews back to earth. --74.
9 k" j& O; u2 [- u7 z# P, ~Upon established, each space station will --75.$ L$ Z4 u$ i! G& j! P
generate its own atmosphere and have its own0 R: l* _) v$ d" q0 O
agriculture. it will need to rotation to provide --76.
, b, I/ Z; N0 xan artificial gravity; people will be forced inwards --77.
3 B& V& q9 @- p* Zfrom the center by centrifugal（向心的）force." g E! \5 ^# P! c
The moon and Mars could become new sources of 1 V6 \7 _3 R5 @, a# P
new materials. Driving through space will no --78.& S8 K- y! K4 y0 U
longer need Earth fuel-the energy would come7 ^- b( A* ?1 `( z- k$ O
from the sun. This energy would be converted from --79.
# m- x: q: y* a0 W7 celectricity to work magnetic rockets.
5 c) f# r/ f: \& J' ~$ JThat all sounds quiet fantastically but, with --80.
" u" {0 ~0 B- sthe rapid development of modern technology, who# t- Q# q+ M) q* S
knows about what the future holds?5 X* H' b+ q6 L
答案：! ~4 z4 c6 Y; J
71. sort -- short
% n' D$ [4 _' e+ g7 G+ y# z$ x% P72. launch -- launched
- R$ Z" G+ L! l6 r2 O/ i73. it -- which
8 p" y( w ^: G! E) y& q3 C+ {74. crews -- crew
$ [4 `$ @" c* L4 S2 O75. Upon --- Once: h& L) N( Q9 p3 T \' K. O
76. rotation -- rotate
5 \* D- @2 y' F# ~( ?: K7 e77. inward -- outwards
% Z; o* N5 X5 r* ?) F78. will -- would+ @6 K9 q( \8 e8 P: o) [
79. from -- into3 g# q# b3 w( u& Q6 v
80. fantastically -- fantastic |
发表于 2012-8-14 10:46:58
