给出了PIC法的计算方法，指出PIC法必须与蒙特卡罗碰撞(MCC)模型和鞘层模型相结合，才能更准确地对ICPS进行模拟。
Calculation method of PIC is given. We suggest that only when PIC is combined with Monte Carlo collision (MCC) and sheath model, can it more precisely simulate ICPS.
基于蒙特卡罗方法，建立了程序模拟离子与原子碰撞中的反冲离子飞行时间谱。
A program is established based on the Monte Carlo technique to simulate the time of flight spectrum in ion atom collisions.
比如，影像右上角可以看到一些陨石坑在巨大卡罗·维斯低地的碰撞特征，看上去有黑色物质环绕，形成的原因正在研究中。
A few craters, such as some in the huge Caloris Basin impact feature visible on the upper right, appear unexpectedly to be ringed with a dark material, the nature of which is being researched.
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