地球和火星大小的撞击物发生如此巨大的碰撞，可能导致了月球的形成。
Such a titanic collision between Earth and a Mars-size impactor may have given rise to Earth's Moon.
出现了碳氢化合物，没有出现一氧化碳，强烈显示2009年的撞击物是缺水的。
The presence of hydrocarbons, and the absence of carbon monoxide, provide strong evidence for a water-depleted impactor in 2009.
算例中，讨论了撞击物的速度以及壳体的几何参数对浅球壳非线性动力响应的影响。
In the numerical calculation, the effects of striking object's initial velocity and the shells 'geometrical parameters on the dynamic response of shells are discussed.
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