No circular dependencies, binaries, libs, docs, builds, third-party code all organized into appropriate folders Physical layout of source tree matches logical hierarchy and organization.
没有循环依赖，二进制文件，库，文档，构建，第三方的代码都组织进合适的文件夹内。源码树的物理布局与逻辑层次、组织方式相匹配。
youdao