And this model is divided into three layers structure: mobile database, data conversion, applications.

此模型分为三层结构，移动数据库层、数据转化层、应用程序层。

youdao

And this model is divided into three layers structure: mobile database, data conversion, applications.

此模型分为三层结构，移动数据库层、数据转化层、应用程序层。

youdao