DLA模型的实现，本程序中没有加任何限制条件，在具体的物理过程中，对于粒子的生长有更高的要求，可在此程序基础上加以改进(The realization of DLA model, this program does not add any restrictions, in the specific physical process, for the growth of particles have higher requirements, can be improved on the basis of this program)