本文首先概述了隐喻研究的历史背景和现状。
The paper firstly reviews the history and status quo of the metaphor research.
分析了变频传动在纸机上的应用现状和背景。
The Present state and background of using inverter drive in paper machine are analyzed.
本文的研究背景、国内外研究的现状、本文研究的内容和意义，以及技术路线。
The research background of the article, the content of study, the technique means of study.
介绍数据清洗问题产生的背景和国内外研究现状。
Firstly, the background of data cleaning problem and research status is explained.
第一章阐述课题的研究背景和目前的研究现状。
In the first chapter, the background and the current situation are expounded firstly.
第一部分：明确本论文研究背景、现状、目的、意义和研究方法。
Part I: a clear thesis of this research background, status, purpose, significance and research methodologies.
主要内容包括 ：数字人体提出的背景和研究现状 ；
The contents included background of digital human body gave and its study status;
主要内容包括 ：数字人体提出的背景和研究现状 ；
The contents included background of digital human body gave and its study status;
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