中文：
尊敬的教授，
我是南开大学生物学系的一名教师，贵校是中国顶尖的大学之一。我向您推荐我的优秀学生张小姐加入您的博士项目。自2019年9月起，张小姐在我的普通生物学课程中表现出色，她经常在课堂上提出自己的见解，并在课后与我交流她所有的创新想法。在完成普通生物学课程后，她的论文非常出色且有说服力。我相信张小姐的勤奋、热情和奉献会使她成为您寻找的理想候选人。
此致，
敬礼
教授 ×××
英文：
Dear Professor,
I am a faculty member in the Department of Biology at Nankai University, a leading institution in China. I am writing to recommend my outstanding student, Miss Zhang, for your PhD program. Since September 2019, Miss Zhang has been one of my students in General Biology. She often presents her ideas in class and exchanges all of her innovative ideas with me after class. Upon completing the General Biology course, her essays were so impressive and persuasive that I believe Miss Zhang's diligence, passion, and dedication will make her an ideal candidate for your program.
Sincerely,
Professor ×××