中文说明：较为详细地介绍了延迟微分方程的概念以及数值解法，并提供具体的计算案例以及在matlab中的实现，并附有一定的源码，适合初学者参考学习
English Description：
This paper introduces the concept and numerical solution of delay differential equation in detail, and provides a specific calculation case and the realization in MATLAB, with a certain source code, which is suitable for beginners to learn