最后，将软件工具分成八类进行简要的评述。

Finally, it gives comments on the tools divided into eight classes.

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在关系数据库再组织中，保持不同信息的八类转换。

Eight levels of transformation preserving different information in restructuring the relational database.

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此外，这里有八类，他们不是别的而是八解脱三摩地。

Also, there are eight kinds, which are none other than the eight Emancipation samadhis.

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