This section summarizes the history and evolution of registration system and then defines the private law character of registration.

该部分首先对登记制度的历史沿革进行了概述，进而界定了登记的私法性质。

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As for the detailed conditions of causing invalidation of administrative contract, it can be scrutinized from three aspects: nature of public law, character of private law and its own characteristics.

至于导致行政契约无效的具体情形，则可从行政契约的公法属性、私法特性及自身特点三个方面来考察。

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The dimensional difference between public law and private law leads to different value orientation, and decides their character difference.

公法与私法维度的差异，决定了二者在价值上的不同取向，从而决定了二者的性格差异。

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