System ability framework | 系统服务框架定义
Providing system resources such as fonts | 字体等系统资源
Compilation and building framework and scripts | 编译构建框架和脚本
Native API header files containing API declarations and comments | Native接口的头文件，包含了接口声明和标准注释。
Obtaining medical sensor data | 获取运动健康类传感器数据
Development self-test framework | 开发者自测试框架
Development self-test and the base library of XTS certification testing | 开发自测试与XTS认证测试基础库
