b*****e
发帖数: 474 | 1 航天飞机 (space shuttle) is quite different from 飞船 (manned spaceship,
or space vessel). Shuttle is reusable (after minor repair/re-condition
of course), but spaceship is one-use.
Shuttle has its landing gear, lands on the airfield directly, has some
manuver-ability by using its rocket engin, while spaceship is a free
fall after re-entry (with a parashute, of course), and has to be
collected. Spaceship may have manuverability in the space as well.
The cost for shuttle research is much much more, but |
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