Dear Professor ××× I am in ××× Institute of ×××, Chinese Academy of Sciences. I am writing to request your assistance. I search one of your papers: 。。。。。。。。。。。。。。。。。（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.Best wishes !(or best regards)×××
