Research goal: to definite the status of the land usage right circulation in rural area in the land utilization history evolution, and to study the development tendency.
研究目的：确定农村土地使用权流转制度在土地利用历史演进中的地位，对其产生的必然依据和发展趋势进行研究。
This paper introduce the history and status of the research and development of the Jute Plastics Composites.
本文介绍了国外黄麻塑料复合材料研究开发的历史和现状。
The development history of the fast reactor technology, the design criterion, design status and safety properties of the experiment fast reactor are briefly presented in this paper.
本文介绍了我国在研究开发快堆技术方面的历史和实验快堆的设计原则、设计简介和安全特性。
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