The supply & demand status and development trends of polyester and PX are analyzed.
分析了近年来国内外聚酯和对二甲苯的供需状况及未来需求发展趋势；
Firstly, the main operation principle, research status and development trends are introduced.
首先介绍了非接触感应电能传输的原理、研究现状和发展趋势。
In this paper we review the research status and development trends of the three kinds of treatment methods which were mentioned above.
本文主要就以上三种治疗方法的研究现状和发展趋势作一综述。
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