three-tier design mode

• 三层设计模式

three-tier design mode的用法和样例：

例句

1. Broadly speaking, we refer to this as the software architectural level of design.
   广泛的说，我们将其称为架构层设计。
2. Using design patterns improves the code reusability and extensibility in data persistence layer design effectively.
   此设计模式的使用可提高数据持久层设计中代码的可重用性和可扩展性。