大模型的引用逻辑、平台之间的数据合作、监管和舆论风向，随时可能改变权重。毕竟AI行业的发展太快了。
First of all, when it comes to application architecture, forget about layers. Assume it’s an archaic way to arrange the design, and that includes layers in circles.
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Higher-level modules are the ones that operate on a higher conceptual level (i.e. algorithms, domain logic, business rules, etc). In other words, they’re more abstract and they govern “what” the application is supposed to do. On the other hand, modules that contain more implementation-specific code (e.g. hardware, I/O, network, etc) are said to be lower-level.