阿兰·谢巴德，第一位美国宇航员，在近一个月之后才进入了太空，相比之下只进行了短暂的不满一整圈轨道的飞行。

Alan Shepard, the first US astronaut, would not be launched until almost a month later and then on a comparatively short suborbital flight.

youdao

阿兰·谢巴德，第一位美国宇航员，在近一个月之后才进入了太空，相比之下只进行了短暂的不满一整圈轨道的飞行。

Alan Shepard, the first US astronaut, would not be launched until almost a month later and then on a comparatively short suborbital flight.

youdao