一个简单的例子是计算相隔十年的两次人口普查之间的平均值，从而估计第五年的人口。
A simple example is calculating the mean of two population counts made 10 years apart to estimate the population in the fifth year.
一个简单的例子是计算相隔十年的两次人口普查之间的平均值，从而估计第五年的人口。
A simple example is calculating the mean of two population counts made 10 years apart to estimate the population in the fifth year.
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