Then in the middle, you find the Business Logic Layer, or the BLL that is the bridge between the Presentation layer and the next layer: the Data Access Layer or the DAL.

 
  • 然后在中部, 您发现企业逻辑层数, 或是桥梁在表示层和下层数之间的BLL: 数据存取层数或DAL 。
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