该系统采用模块化结构，自顶向下的程序设计方法。

The mode structure is applied in this system which is vertically programmed (by a way from top to bottom).

youdao

该系统采用模块化结构，自顶向下的程序设计方法。

The mode structure is applied in this system which is vertically programmed (by a way from top to bottom).

youdao