但聚集又分为集中聚集和分散聚集。
However clustering includes centralized clustering and decentralized clustering.
集中聚集是指在规模经济许可的范围内，成规模、有重点的聚集。
The centralized clustering refers to clustering with scale and focus within the tolerable scope of scale economy.
然而，那篇文章没有解决在聚集中支持分组操作符的问题。
However, it specifically did not address the issue of supporting grouping operators for the aggregates.
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