【摘 要】
：
The travels of Song Yun and his party,the envoys of the Northe Wei dynasty,on their mission to the West,as recorded in Luoyang Qielan Ji (ch.5)1,provides import
【机 构】
：
Institute of History, Chinese Academy of Social Sciences
论文部分内容阅读
The travels of Song Yun and his party,the envoys of the Northe Wei dynasty,on their mission to the West,as recorded in Luoyang Qielan Ji (ch.5)1,provides important data for researching the history of East-West communications and the history of the Weste Regions.The purpose of this paper is to provide concise commentary on the data contained in the account,assimilating the research achievements of my predecessors,[1] and adding my own opinions.My commentary is intended make the focal points stand out,rather than to cite the various theories presented by my predecessors,which I only present when they have a direct bearing on the history of East-West communications and the history of the Weste Regions.
其他文献
The book A Competition for Clean Air:The Air Pollution Regulation of the United States in the 20th Century from the Perspective of Environmental-Political Histo
全球工业化的发展导致大量的污染物进入环境,对人类的健康造成了极大的危害.通过污染物超富积植物吸收和降解环境中污染物的技术—植物修复,已经成为研究和开发的热点.用于植
“人多地少、土地资源稀缺”一直是我国的基本国情。当前我国正处于工业化、城镇化高速发展时期，人地矛盾、供需矛盾日渐突出，大力开展土地集约利用成为化解矛盾的有效途径。
This study covers a short time span starting from 1978,the year when the Reform and Opening-up was initiated in mainland China,up to 2014.During the past thirty
本研究以烟草(Nicotiana tabacum L．K 326)为材料，在砂培条件下研究了不同形态氮素并结合使用外源ABA和6-BA对烟草生长、水分吸收和蒸腾、养分吸收和分布以及钾在烟株体内循环的影响。主要结果如下： 设硝态氮、硝酸铵、铵态氮、铵态氮+6-BA四个处理。处理12天后，铵态氮处理表现出明显的氨毒害症状，与硝态氮处理相比，干物重净增量降低了57．8％。硝态氮和硝酸铵处理烟株的水