You then have analog pins 3 to 6 available for sensor input; assuming pins 1 and 2 are reserved for use by the Ethernet shield (see Resources for more about pin usage).

模拟的插脚3到6可供传感器输入使用；假设插脚1和2保留给Ethernet shield使用(查看参考资料，以了解有关插脚使用的更多信息)。

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For example, an input sensor may be feeding an accurate analog reading to a signal converter, but a faulty signal converter may be sending the CPU an inappropriate digital signal.

例如，输入传感器向信号转换器输入一个正确的模拟信号，但是错误的信号转换可能向CPU输入错误的数字信号。

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It includes a motion sensor and a touch-tracking pad that allows 360-degree analog input.

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