Throughout this column, I will be referring to simple, direct, upgrades meant for average users.

在本专栏中，我将倾向于那些简单、直接、适用于普通用户的升级方法。

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For multiple column work, a better average is 40 to 50 characters.

对于多列页面，平均在40至50个字符每行最好。

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Compute the centroid, which is the average of each column of data using only the members of each cluster.

计算重心，即只使用每个群集的数的每列数据的平均数。

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