That could be because the collision that made the moon in the first place was so hot that volatile elements like hydrogen, a key component of H2O, largely burned away.
这可能是因为月球形成过程中，撞击产生的热能使挥发性氢元素——水的重要组成成分——大量流失。
This work focus on the calculation of the cross-section of the electron-hydrogen like Uranium collision. The interference effect of DR and RR was investigated near the resonant energy.
本工作计算了电子与类氢的铀离子碰撞截面随能量的变化，研究了在共振能量附近，DR和RR过程的干涉。
But the collision probability of the spray particle against the cylinder wall will increase when the hydrogen concentration in the air exceeds a certain limit.
但氢气浓度超过一定值后则会增大柴油液滴碰壁的概率。
A representative radial wave function of two electrons scattered in the collision of an electron with a hydrogen atom. (Image courtesy of National Energy Research Scientific Computing Center.)
由于电子与氢原子碰撞所造成的典型双电子散射所造成的放射状波函数(此图形由国家能源研究科学计算中心所提供。)
A representative radial wave function of two electrons scattered in the collision of an electron with a hydrogen atom. (Image courtesy of National Energy Research Scientific Computing Center.)
由于电子与氢原子碰撞所造成的典型双电子散射所造成的放射状波函数(此图形由国家能源研究科学计算中心所提供。)
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