Starting top down - Business layer.
自顶向下——业务层。
Table 2: Business Layer (Partial Sample).
表2：业务层(部分示例)。
Do you know what a stateless business layer is?
是否了解什么是无状态的业务层？
The business layer generally interacts with the information system through the data access layer.
业务层主要通过数据访问层与信息系统实现交互。
Model is also pretty easy to understand: business processes and objects exist in this layer.
模型也是很容易理解的：业务逻辑和对象都处于这个层。
This is particularly important for abstractions directly exposed at the business and service layer.
这对于直接在业务和服务层公开的抽象非常重要。
Therefore, the middleware layer enhances the focus on the core business function of the application.
因此，中间件层更注重考虑应用程序的核心业务功能。
The View layer is thin and supplies no business logic.
视图层比较单薄，它不提供业务逻辑。
However, any dependencies between them are now clearly evident within the business process layer.
不过，其间的任何依赖关系限制都完全在业务流程层内进行了处理。
Instead, they exist in the business logic layer.
它们存在于业务逻辑层。
Business logic should be in a higher layer of your application.
业务逻辑应该在你的应用的一个高一些的层次里。
A two-layer model for business workflows.
业务工作流程的一个两层模型。
The Data Layer contains the Business Intelligence data stores.
数据层（Data Layer）包含商业智能的数据存储。
The Data Layer contains the Business Intelligence data stores.
数据层（Data Layer）包含商业智能的数据存储。
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