说明：  快速掌握verilog实例化分享程序，对于使用verilog编写的固件，需要功能划分，体现实例化的用处，便于归档提取，以备再次使用
(Quickly grasp the Verilog instantiation sharing program, for the use of Verilog firmware, the need for functional division, to reflect the usefulness of instantiation, easy to archive extraction, for re use)