送交者: steven 于 2005-8-09, 13:00:06:
回答: 尔曹身与名俱灭，不废美国太空游 由 炎阳 于 2005-8-09, 12:23:20:
true in many sense. Shuttle is very old, and it has already passed its design life time. The tile used on the shuttle is certainly old, better tile has been invented. Most of the control system software and hardware on the shuttle are out of date. It is about time for new system.