连接点模型是AOP中最基本和最独特的概念，它定义了系统中哪个连接点是公开的，以及如何捕获它们。
The join point model, the most fundamental and distinguishing concept in AOP, defines which join points in a system are exposed and how they are captured.
领域模型用于建立系统的边界和概念。
The domain model is used to establish the boundary and concepts of the system.
我们查看了模型、模板、视图和URLconfs等概念；并且稍微了解了Django优秀的自动管理界面系统。
We have looked at the concepts of models, templates, views, and URLconfs; and we have seen a glimpse of Django's brilliant automatic administration interface system.
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