所谓的地球分离级和牵牛星月球着陆器在核心级之上，被发射进入轨道后，与载有登月宇航员的猎户座太空船会合。

A so-called Earth Departure stage and Altair lunar lander would sit atop the core stage and be launched into orbit to meet Orion spacecraft carrying moon-bound astronauts.

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尽管前苏联抢占了太空竞赛的先机，第一艘绕行星而不是地球飞行的太空船来自美国，第一位登月宇航员也是美国人。

Although the Soviet Union initially led the space race, the first spacecraft to fly by a planet other than Earth was an American one, and the first man on the moon was also an American.

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美国白宫预算办公室在网站上说，此次宇航员登月计划进度落后于原定计划，耗资超出预算开支，并且从全局的角度来看，没有其他的空间计划重要。

On its Web site, the White House Budget Office says the program to send astronauts to the moon is behind schedule, over budget and overall less important than other space investments.

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