本小节将介绍两层的仓库建模方法，该方法最适合于自底向上的实现。
This section introduces the two-tiered warehouse modeling approach, which is the best fit for a bottom-up implementation.
一个比较明智的手段应该是首先按照自顶向下来做，接下来进行目标服务建模，最后是自底向上的现有资产的遗留分析。
A more judicious approach would be to first do top-down, then goal-service modeling, and finally bottom-up legacy analysis of existing assets.
我们讨论了自底向上的分析以及对接口和组件的建模。
We described bottom-up analysis and the modeling of these external systems in terms of interfaces and components.
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