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orbital spaceflight中文是什么意思

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用"orbital spaceflight"造句"orbital spaceflight"怎么读"orbital spaceflight" in a sentence

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  • 轨道航天技术

百科解释

An orbital spaceflight (or orbital flight) is a spaceflight in which a spacecraft is placed on a trajectory where it could remain in space for at least one orbit. To do this around the Earth, it must be on a free trajectory which has an altitude at perigee (altitude at closest approach) above (this is, by at least one convention, the boundary of space).
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