[1] Beijing Language & Culture Univ, Fac Foreign Studies, Dept English Studies, Beijing 100083, Peoples R China
[2] Jiangsu Ocean Univ, Sch Elect Engn, Lianyungang, Peoples R China
[3] Southwest Minzu Univ, Fac Chinese Language & Literature, Chengdu, Peoples R China
[4] City Univ Macau, Fac Humanities & Social Sci, Macau, Peoples R China