About Yu Hongyan
About 牡丹江師范学院経済与管理学院,黒竜江牡丹江,157012
About Wang Qunyong
About 南開大学数量経済研究所,天津,300071
About Liu Jisheng
About 東北師范大学地理科学学院,吉林長春,130024
About Lvyou Kexue
About wave motion
About center of gravity
About polarization(phenomenon)
About sightseeing
About directionality
About standard deviation
About marginal sea
About inland
About 需給
About 構造改革
About Sightseeing,recreation
About 構造改革
About 背景
About 中国
About 観光
About 需要
About 調和
About 時空間