That's the explanation of the difference between regional contribution rates of technological advance.

这是造成区域技术进步贡献率差异的原因。

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Difference is the core of the study regional economics.

没有差异无所谓区域，差异是研究区域的核心。

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Difference is the core of the study regional economics.

没有差异无所谓区域，差异是研究区域的核心。

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