Profile layer: the profile layer defines the minimum set of application programming interfaces (APIs) available on a particular family of devices.

框架层(Profile Layer)：框架层定义了特定系列设备上可用的应用程序编程接口(API)的最小集。

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For the development of upper layer communication protocols and application software, this system also provides wireless communication interfaces and application program framework.

为了更好地支持上层通信协议和应用软件的开发，该系统还提供了无线通信接口和应用程序框架。

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