本文在此接口协议模型之上，设计出通信协议，实现宿主机和电台间的数据传递、电台管理与控制、状态通告等功能，并为今后的功能扩展预留了接口。

We designs a communication protocol on this model, implementing many functions between host computer and radio, such as data transmission, radio management and control, status advertisement, etc.

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象Twitter和Facebook这样的社交网络站点通常只是为那些希望与朋友和家人保持联系，通告他们的生活状态和活动而准备的。

Social networking sites like Twitter and Facebook are mostly used by those who want to keep their friends and families informed about their lives and activities.

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