However, the design and calculating method of it need more attention and urgent research works.
然而，其设计与计算方法仍然是一个亟待作深入研究的课题。
Second part: Research design and method.
第二部分：研究设计与方法。
DESIGN: a randomized controlled research on technique and method.
设计：随机对照的技术方法研究。
The advanced design method, research and working principle are discussed.
介绍其现代设计方法、研制规划及工作原理。
The second chapter is research method, questionnaire design and investigation course.
第二章是研究方法、问卷设计与研究过程。
The second part is the research method and its design.
第二部分为研究方法与设计。
The second part is the research method and its design.
第二部分为研究方法与设计。
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