这五列的重复组（我称之为列的 period，因为没有更好的术语）的大小为 4、8、16、32 和 64。

The sizes of the repeating groups (which I'll call the period of the column, for lack of a better term) are 4, 8, 16, 32, and 64 for the five columns.

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《苏格兰五岁儿童龋齿的城乡差异》，凯特·a·列文等，爱丁堡大学。

Urban-rural differences in dental caries of 5-year old children in Scotland.

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第五列是用户的全名，或者是注释。

The fifth column contains the user's full name, or a comment.

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