No knowledge of SQL is required to develop the other application layers.

开发其他应用程序层时，不需要SQL 方面的知识。

youdao

You should refactor the code to separate the various application layers.

应当重构代码以分离各个应用层。

youdao

You should refactor the code to separate the various application layers.

应当重构代码以分离各个应用层。

youdao