摘要
Instructions for Submissions Manuscripts （less than 7500 words） should be submitted online at： http：//mc.manuscriptcentral.com/cwe. Submissions must be typed according to the following format： The title page should contain： （i） the title of the paper, （ii） a suggested running head （abbreviated form of title）, （iii） the full names of the authors and （iv） their positions at relevant institutions （e.g. Associate Professor）, （v） the addresses of the institutions at which the work was carried out together with （vi） the full postal and email address, plus facsimile and telephone numbers,
Instructions for Submissions Manuscripts （less than 7500 words） should be submitted online at： http：//mc.manuscriptcentral.com/cwe. Submissions must be typed according to the following format： The title page should contain： （i） the title of the paper, （ii） a suggested running head （abbreviated form of title）, （iii） the full names of the authors and （iv） their positions at relevant institutions （e.g. Associate Professor）, （v） the addresses of the institutions at which the work was carried out together with （vi） the full postal and email address, plus facsimile and telephone numbers,
