NASA's most important job was to send an American into space and return him safely to Earth. 国家航空与航天管理局最重要的工作是把美国人送入太空，并且安全接回地球。
One U.S. communications satellite has collided with one defunct Russian satellite in space, NASA said Wednesday. 美国国家航空与航天管理局周三对外报，国内一通讯卫星在空间与俄国一报废的卫星撞击了。
