It is the logical value of institutional design. It is the approach of political civilization.

制度设计在逻辑上蕴涵了制度文明的价值追求，它是实现制度文明的基本途径。

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For a logical type of data, its value is only d.

对于一个逻辑型的数据，其取值只能是D。

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For a logical type of data, its value is only d.

对于一个逻辑型的数据，其取值只能是D。

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