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软件设计和开发到后面真的就是哲学
”When working on your data model you find that two or more types have properties in common, ask yourself if those properties are being used to describe some higher-level characteristic common across the types that might better be modeled as an aspect.“
"One way of deciding if a domain object should be modeled as a type or an aspect is to think about if it is a noun or a verb. "