微软应用软件架构设计指南2.0 种定义(二) The highest-level breakdown of a system into its parts The decisions that are hard to change There are multiple architectures in a system What is architecturally significant can change over a systems lifetime In the end architecture boils down to whatever the important stuff is微软应用软件架构设计指南2.0 • 三种定义（二） The highest-level breakdown of a system into its parts. The decisions that are hard to change. There are multiple architectures in a system. What is architecturally significant can change over a system’s lifetime. In the end, architecture boils down to whatever the important stuff is