我们注意到大多数层次架构图都是团队或项目所用的高层次图表的主要形式，通常不太容易从众多的代码基中找出层次架构图的踪迹。
We noticed that most Layered Architectural diagrams are the main form of high-level diagrams used by teams on a project - and that they are often not easy to find on many codebases.
出于清晰性的考虑，在本例中，我们选择首先使用高层次演示图来呈现一个物理模型，然后使用一个更加具体的结构图。
For the sake of clarity, in this example, we have chosen to represent the physical model with a high-level illustrated diagram first, and then with a more detailed textual one.
我们将首先从一个更新过的层次结构图开始，它表明了哪个类提供了对HTTP连接的支持。
We'll start with an updated hierarchy diagram that indicates which class provides support for HTTP connections.
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