An active research in data mining area is the discovery of sequential patterns, which finds all frequent sub-sequences in a sequence database.

数据挖掘领域一个活跃的研究分支就是序列模式的发现，即在序列数据库中找出所有的频繁子序列。

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Data mining is the most critical steps in knowledge discovery, but also the technical difficulties in knowledge discovery, is the very active area of research nowadays.

数据挖掘是知识发现中最关键的步骤，也是知识发现技术难点，是目前相当活跃的研究领域。

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An active research in data mining area is the discovery of sequential patterns, which finds all frequent sub - sequences in a sequence database.

数据挖掘领域的一个活跃分支就是序列模式的发现，即在序列数据库中找出所有的频繁子序列。

youdao

The data also suggests that quality of broadband plays at least some role in how active an area is with piracy.

BBC: A glimpse at piracy in the UK and beyond