Image Credits:Apple
To achieve testability in modular software we need to leverage the Dependency Inversion Principle (DIP) up to the level of application architecture. That was the reasoning behind introducing the concept of Infrastructure-Modules. When we extract all the infrastructure code from Business-Modules, they can stay focused on the business logic and have no design/compile-time dependencies on any untestable infrastructure code. As a side effect, we achieve Separation of Concerns.，这一点在夫子中也有详细论述
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这意味着，消费者的需求远比S/M/L、甚至75B/80/A/70C细化得多。。91视频对此有专业解读
there are a few changes I want to make to Typst that are breaking no