第三部分，即第四章。这一部分是本研究的国际背景。
The third part, namely the fourth chapter, is the paper's international basis.
第四部分即第四章和第五章。这一部分，主要是对招投标质量控制管理系统进行研究和设计。
The fourth part, the fourth chapter and the fifth chapter, mainly carries on study and design of bidding quality-control management system.
第二部分即第四章，从设计艺术学的角度对古代图形印的造型、纹样、构图进行研究，分析其艺术特色与设计规律。
The second part, that is chapter four, studies graphics seal's shape, pattern, and composition from the viewpoint of art and design, and analyzes its art and design characteristics and rules.
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