全面阐述了本课题研究的背景、现状、目的和意义及自主学习的理论研究。
A comprehensive exposition of the background to the study of this subject, status, purpose and significance of the self-study and theoretical research.
绪论部分简要介绍了博客的研究背景（现状），本文的研究目的、研究理论和方法。
The exordium abstractly introduces the Blog studying background (status quo), the studying objective of the thesis, the theory and methodology.
在绿色包装的产业链中，包装废弃物的回收占有重要地位。本文就此问题的背景、现状和技术进行了全面的论述。
The reclaim of the package waste has important position in the green packaging production chain. The background, present situation and technology involved were discussed comprehensively.
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