送交者: deadmeat 于 2007-11-13, 14:39:07:

回答: In that NASA site, it says already that currently no rocket 由 steven 于 2007-11-13, 13:21:04:

• well, you can use ion engine to do that, even to 100km/s. - steven (49 bytes) 2007-11-13, 16:25:11 (182638)

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