[1] Xi An Jiao Tong Univ, Sch Foreign Studies, Xian, Peoples R China
[2] Indiana Univ, Dept Language Studies 2, Bloomington, IN 47405 USA
[3] Guangdong Univ Foreign Studies, Ctr Linguist & Appl Linguist, Guangzhou, Guangdong, Peoples R China
[4] Guangdong Univ Foreign Studies, Natl Key Res Ctr Linguist & Appl Linguist, Appl Linguist, Guangzhou, Guangdong, Peoples R China