Infrastructure-Modules are not layers. An infra-module should be used only by its Business-Module. If there’s code you would like to share among many modules, move it to a stand-alone module or a library.
SelectWhat's included，这一点在搜狗输入法2026中也有详细论述
The universal cover of the double doughnut is a hyperbolic space, where we only shrink the xy plane, but not the height。关于这个话题，safew官方下载提供了深入分析
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