ingrate
发表于 2025-3-23 11:59:09
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使服水土
发表于 2025-3-23 17:54:32
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微枝末节
发表于 2025-3-23 19:37:34
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令人作呕
发表于 2025-3-24 01:36:30
Abort modes and the challenges of entry, descent and landing,ve been faced before. For example, one of the overriding factors making a Mars mission so fundamentally different from lunar missions is the lack of opportunity to abort the mission, since, once the trans-Mars injection maneuver (TMI) has been performed, the crew is committed to a four to six month
冒烟
发表于 2025-3-24 02:23:17
Propulsion systems, is focused upon concepts that, while offering significant performance improvements over present systems, have fundamental scientific issues that must be resolved before they can be seriously considered. For example, fusion and antimatter are both appealing as a propulsion option for manned Mars mis
吗啡
发表于 2025-3-24 08:32:50
Mars hardware,er 3) is similar to NASA’s Constellation Design Reference Mission (DRM) and assumes a manned Mars mission will utilize the major elements of NASA’s Constellation development effort including a new family of all-chemical launch vehicles, flight components, ground services and no in-situ resource util
广口瓶
发表于 2025-3-24 13:18:59
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疏忽
发表于 2025-3-24 15:54:11
Biomedical and behavioral issues,itions were also afflicted by depression, lethargy and disabling psychological events. While the dangers of malnutrition were an ever-present and, occasionally, life-threatening risk for early explorers, medical dangers such as radiation, bone demineralization and psychological dysfunction present r
承认
发表于 2025-3-24 21:57:43
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declamation
发表于 2025-3-25 00:00:27
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