在此只把在离线编程过程中常用到的功能列出进行简要说明，一些不常用或者没用到的功能没有进行说明，有兴趣可以在业余时间练习使用。(In this case, the list of functions that are commonly used in offline programming are briefly explained. Some functions that are not commonly used or not used are explained. They are inte