Dear Professor ××× I am writing to request your assistance. I search one of your papers: I am in ××× Institute of ×××, Chinese Academy of Sciences. 。。。。。。。。。。。。。。。。。(你的文献题目) but I can not read full-text content, would you mind sending your papers by E-mail? Thank you for your assistance.本人的经验是讲英语的国家的作者给文章的机率会大,一般你要就会给,其它不讲英语的国家,如德国,法国,日本等国家的作者可能不会给。出于礼貌,如果你要的文献作者E-mail给你了,千万别忘记回信致谢. Best wishes !(or best regards) ×××