本文较详细地介绍了美国马丁·玛丽埃塔公司最近研究设计的一种低温上面级的布局、结构和性能。
This paper describes a short, high-performance cryogenic upper stage designed by Martin Marietta for optimum performance when launched with an attached payload by an NSTS 65K Orbiter.
在他们的发现激情的推动下，那些有远见的科学家仅带着他们的藻类和他们研究的身体离开了马丁·玛丽埃塔。
Driven by their passion for their discoveries, these visionary scientists spun off from Martin Marietta taking with them both their algae and their body of research.
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