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1·This is an example of an analog representation of a number.

这是一个例子，一个模拟代表性的一个数字。

2·The voltage may provides an analog representation of the temperature difference.

电压可以成为温差的模拟表示。

3·The voltage may provides an analog representation of the temperature difference .

电压可以成为温差的模拟表示。

4·The first problem was that an analog input signal had to be represented as a sequence of samples of the signal, which were then converted to the computer's numerical representation.

第一个问题是一个输入的模拟信号必须被重新表达为信号取样的序列，然后这些序列被转换成计算机的数字表达式。