对自然生态环境和人类文化景观双重属性的关注是景观生态学的重要研究课题。
Concern over natural ecological environment and cultural landscape is an important research subject of landscape ecology.
基于以上认识，笔者认为从产权理论的角度来研究我国商业银行体制改革这一课题，具有理论上和实践上的双重意义。
From the above, the author thinks the research task of our commerce Banks system reform from the point of property right theory has double significance both in theory and practice.
曲线长度的度量和分析是一项具有基础理论和应用价值双重意义的研究课题。
Measuring and analysis of curve length is a valued research subject both in basic theory and practical application.
如何合理设计开发平台，为高等院校提供一种功能完备、价格低廉、技术流行、能满足教学和开发双重需求的手机编程开发平台正是本课题研究和解决的重点。
The system aims to design a platform for universities, reasonable in price and advance in technology, and to meet the double demands of teaching and development.
本课题以较为典型的升降横移式立体车库为研究对象，综合考虑立体车库制造成本和运行效率的双重因素。
The topics to a more typical three-dimensional garage for lifting and transferring research object, considering the three-dimensional garage manufacturing costs and the efficiency of the dual factor.
丙烷是天然气中所含低碳烷烃的重要组分，催化选择氧化丙烷这一课题具有工业应用和理论研究的双重价值。
Propane is one of the important short chain components in natural gas and the selective oxidation of propane is promising for its potential in industrial application and academic study.
利用钛的“双重性”，加入适当的质量分数，是提高铸铁材料质量的重要课题之一。
How to utilize the "dual nature" of titanium, by adopting proper addition of titanium, to increase the quality of cast iron will be a important subject to study.
利用钛的“双重性”，加入适当的质量分数，是提高铸铁材料质量的重要课题之一。
How to utilize the "dual nature" of titanium, by adopting proper addition of titanium, to increase the quality of cast iron will be a important subject to study.
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