自2003年美国“哥伦比亚号”航天飞机不幸失事以来,先后有两架航天飞机完成了飞行、科研任务,尽管升空时间因天气、部件等原因一再推迟,但是最后都完成了预定任务顺利返航。于是,一度陷入低潮的航天话题又重新热了起来。尤其引人关注的是太空旅游以及对民用技术的助推作用,这些 Since the unfortunate tragedy of the U.S. space shuttle Columbia in 2003, two space shuttles have completed their flight and scientific research missions. Despite the delay in launching time due to the weather, parts and components, the scheduled missions have been completed successfully. As a result, the once sluggish aerospace topic has re-heat up. Of particular concern are space tourism and the boosting of civilian technology, these