抛物线轨道;
After the first stage burns out, it falls back to earth along a parabolic path, while the engines of the second stage fire to thrust the rocket into an earth orbit.
当第一级烧毁后,沿抛物线的轨道落到地球,而第二级的发动机点火把火箭发射到地球轨道。
In this paper we did research on the heat flow, temperature, structural changes, and their influencing factors of parabolic satellite antenna in near-earth orbit, which provides future theoretical references for antenna thermal and structural design.
本文以抛物面型星载天线为研究对象,分析其在近地轨运行时的外热流、温度场和结构场的变化情况和影响因素,为天线的热设计和结构设计提供理论依据。
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