本设备还可用于引起使用者的注意、命令计算机读出一段文字或向电视等外部设备发出指令。
The device can also be used to attract a minder's attention, to get a computer to read out a text or to send commands to external devices such as a TV.
微处理器执行代码指令进行算术运算，内部数据的传递以及与外部设备通信。
A microprocessor executes encoded instructions to perform arithmetic operations, internal data transfer, and communications with external devices.
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