SS is a main subroutine, transfering four branch subroutines, and complete design.

SS为主子程序，调用其它四个分子程序，实现整个设计过程。

youdao

Now what has changed since the branch to subroutine-era?

自从分支到子程序时代以来，现在有什么已经被改变了？

youdao

Now what has changed since the branch to subroutine-era?

自从分支到子程序时代以来，现在有什么已经被改变了？

youdao