将一篇英文新闻文章翻译成中文。



Title: NASA and SpaceX Plan Historic Astronaut Launch

NASA and SpaceX are preparing for the launch of a Crew Dragon spacecraft with two American astronauts aboard. The launch, scheduled for May 27, will be the first crewed launch from American soil since the end of the space shuttle program in 2011.
NASA和SpaceX计划历史性地发射宇航员

NASA和SpaceX正在为搭载两名美国宇航员的Crew Dragon宇宙飞船的发射做准备。该发射定于5月27日进行，这将是自2011年航天飞机计划结束以来美国境内首次搭载载人的飞行。