(中文版)
尊敬的老師：
我叫xxx，是xx大學化學學院20xx級有機化學碩士研究生，通過貴所博士招生信息介紹和師兄的推薦，我希望能夠有機會報考您20xx年的博士研究生，所以非常冒昧的給您寫信。
碩士期間我主要在做xx工作(簡單的介紹下自己碩士期間作的工作)，經過兩年多的學習和實踐，在導師的精心指導以及實驗室良好的學術氛圍影響下，我在設計實驗、操作能力，以及論文撰寫方面積累了一定的經驗，為讀博打下堅實的基礎。
我在網上查閱了您的有關資料，并看了些您發表的文章，對您所研究的課題很感興趣，所以非常的希望能在您的課題組攻讀我的博士學位，我相信通過自己的努力，我能很好的完成博士期間的任務。
冒昧致信，懇請您海涵!非常感謝您能在百忙之中抽出時間閱信!
此致!
祝身體健康! 工作愉快!
此致
敬禮!
自薦人：xxx
xx年xx月xx日
(英文版)
Dear Prof. xxx:
I am a postgraduate student ofxxxxxxxxxxxxxI went to your class and deeply touched by your wisdom and academic thoughts. I had the pleasure of reading your book , and can’t be more agree with your point of view and admire very much on your academic level. I would apply for your doctoral student ofxxxx
My postgraduate tutor is Professor xxx, and (碩士時期的研究方向) is my research direction. During my graduate study, I participated in many subjects, includingxxxxI have accumulated a lot of experiences about scientific research.
Thank you very much for reading my letter , if given a chance to pursue advanced studies, I would highly appreciate. I’m looking forward to hearing from you.
Sincerely，
xxx