分层模式为软件体系结构提供了总体的基础结构，以支持项目的产品线开发策略。
pattern gave the overall, fundamental structure to the software architecture to support the project's product-line development strategy.
例如，所有软件系统的一个关键方面是内部依赖关系的组织；表示这种关系的一个方法是采用分层体系结构。
For example, a critical aspect of all software systems is the organization of internal dependencies; one way to express these relationships is with a layered architecture.
分层模式提供了支持某一产品线策略所必需的整个体系结构的结构，它将可重用和特定于平台的软件要素分离成不同的层。
Layers provided the overall architectural structure required to support a product-line development strategy by separating reusable and platform-specific software elements into different layers.
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