在1973年5月无人空间站到达轨道前不久，空气动力压力扯破了一个流星体和挡热板。 分析：首先，从逻辑上看，说：“空气动力压力扯破了一个流星体”，是不合事理的，荒谬可笑的。
Shortly before the uninhabited space station reached orbit in .May 1973,aeroaynamic pressure ripped off a meteoroid and heat shield.
科学家已经分析了奥特云中的彗星，并得出推论称，其中25%的彗星在它们改变运行轨道前，需要至少木星大小的星体提供推动力。
The scientists have analysed the comets in the Oort cloud and deduced that 25 per-cent of them would need a nudge by a body of at least Jupiter size before they changed orbit.
结果表明，运用所建立的落轴冲击有限元计算模型分析轨道结构动力性能，直观有效。
The results show that it is more intuitive and effective to study the track dynamic performance by the presented wheel-load-drop FEM model.
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