Part 2 is the relevant research progress at home and abroad. Summe up the domestic and international spatial structure of tourism.
第2部分是国内外研究进展，总结了国内外旅游空间结构相关研究进展。
The second part introduced relevant concept of collaboratory, power line communication technology, and power line network unit, etc. as well as the latest research progress both at home and abroad.
第二部分介绍了协同实验室，电力线通信技术，电力线网络单元等相关概念以及国内外最新的研究进展情况。
This paper reviews recent relevant bifidobacterium plasmid isolation, vector, genome sequencing and gene therapy in the application of research progress.
综述了近年来有关双歧杆菌质粒分离、载体构建、基因组测序以及在基因治疗上的应用等研究进展。
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