Part II: The research prerequisite and the theoretical base.

研究前提与理论基础。

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The second part (Chapter 2-3) : By drawing on research results related to a gradual manner, as the illusion, landscape, spatial concepts were discussed, the theoretical basis for the following.

第二部分(第2 - 3章)：通过借鉴相关研究成果，以渐进的方式对视错觉、景观、空间的概念进行了论述，为下文奠定理论基础。

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Part one: the theoretical research of the structure of investigation procedure.

第一部分：侦查程序构造的理论研究。

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