中文说明：
搭建切换系统的模块，很有用的哦，在此基础上很容易搭建时滞系统的仿真模块哦，还可以提出宝贵的意见修改哦。
English Description：
It is very useful to build the module of switching system. On this basis, it is easy to build the simulation module of time-delay system. You can also put forward valuable suggestions for modification