研究了文题体系的萃取机理。

The extraction mechanism on the system concerned has been studied.

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讨论了文题实现方法，介绍了该数据库的总体结构。

The general structure of the title database is presented.

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但是整篇文章结构文不符题。

But the whole article is not so nicely constructed to serve its title.

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但是整篇文章结构文不符题。

But the whole article is not so nicely constructed to serve its title.

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