About Sun Yanyan
About 上海師范大学旅游学院,上海,200234
About Diyu Yanjiu yu Kaifa
About labor productivity
About carbon
About travel
About sightseeing
About discharge
About sustainable development
About structure effect
About carbon dioxide emissions
About 因子分解
About 旅行者
About ボトムアップ
About エネルギー強度
About 炭素強度
About 二酸化炭素放出
About Environmental problems
About 上海
About 旅行
About 炭素排出
About 推定
About 分解