在 RTSJ 规范中，RT 线程需要真正的优先级，以及具有优先级继承支持的固定优先级抢占式调度程序。
With the RTSJ, true priorities and a fixed-priority preemptive scheduler with priority-inheritance support is required for RT threads.
当使用枚举时，建议使用新的固定的基本类型规范，因为它具有更强的类型检查和代码完成。
When using enums, it is recommended to use the new fixed underlying type specification because it has stronger type checking and code completion.
蓝牙技术是一种无线数据与语音通信的开放性规范，它以低成本的近距离无线连接为基础，为固定与移动设备通信环境建立一种无线连接。
Bluetooth Technology is a kind of open specification for wireless data and voice, it is basic on low cost short-range radio link, and it can build a wireless link for immobile and mobile device.
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