故论文的选题具有理论意义和实用价值。

So, the selected topic of thesis has important value in theory and practice.

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因此，本论文的选题具有很重要的理论意义和实践价值。

Therefore, the topics of this dissertation have the great theory significance and application value.

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因此，本论文的选题具有很重要的理论意义和实践价值。

Therefore, the topics of this dissertation have the great theory significance and application value.

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