说明：  详细介绍了波动方程怎样通过有限差分的方法离散化，是计算机模拟地震波、声波传播的理论基础，本人就是从中受益的，且编出的程序已在Unix-Linux系统中通过，绘出的图形得到了老师的认可
(Described in detail how the wave equation through the finite difference method of discretization is a computer simulation of seismic waves, sound waves spread of the theoretical basis, I benefit from that, and that the procedures have been prepared in the Unix-Linux system is passed, the graphics have been drawn the teacher)