论文首先阐述了选题背景与研究的目的和意义。
The paper first elaborates the goal and significance of background and research.
指出了本课题提出的背景，研究的目的与意义，研究方法等。
Pointing out the background of the problem, the purpose, the significance and the research method.
说明研究本课题的原因、研究的目的与意义。
Make clear the purpose of the research and its significance.
这也正是本研究的目的、意义与价值所在。
This is also the purpose, the significance and the value of the study.
目的研究胎儿感染乙型肝炎病毒与胎盘感染之间的关系及其意义。
Objective To study the relationship between fetal infection and placental infection of HBV.
研究目的：分析建设用地集约利用的意义、制约因素与对策。
The research objective of this paper is taking non-constructive land into urban planning system.
研究目的：分析建设用地集约利用的意义、制约因素与对策。
The research objective of this paper is taking non-constructive land into urban planning system.
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