范文一：

　　In capacity as Professor of Mathematics at Fudan University?I'm writing to

　　recommend Mr. Wang?Gesintosyour PhD program in Computer Science. I have known

　　Mr. Wang since his sophomore year of college?and have acted as his thesis

　　advisormentor. In my experience?he is a gifteddiligent student?and an admirably

　　hard worker.

　　Wang is an impressive student because he has been forced to overcome the

　　significant challenge of a serious illness during his freshman year. When I

　　first met Wang in my Discrete Math class?he did not appear to be anything

　　special to me. While his exam scores were good?they were not as high as I would

　　now expect of him. What I didn't know then was that due to his illness?Wang was

　　attempting to take all of the difficult early mathematics courses at one

　　time?including Discrete Mathematics?Advanced Mathematics?Linear Algebra?and

　　Possibilities. While most students found preparing for just one set of these

　　exams difficult?Wang was overwhelmed by four of them. But in the end?he achieved

　　an impressive score on the final exam?which made me conscious of his unusual

　　determination he demonstrates when confronting difficult challenges.

　　Mr. WangI have often talked about a variety of mathematicscomputer science

　　conceptsproblems. During these discussions?I always found him to be delightfully

　　intelligent. Not only does he quickly understand the conceptsproblems presented

　　to him?he is able to analyze these problemspresent solutions. But perhaps most

　　important is that Wang's thinking is intensely rigorous. When looking at any

　　question?he carefully scrutinizes itif he finds any uncertain issue

　　he clears them up immediately. I believe this kind of thought is essential

　　to become an excellent computer programmer.

　　Serving as his thesis advisor?I had a first-hand opportunity to observe the

　　way in which Wang's mind works. In his senor thesis?Mr. Wang mainly discussed

　　two challenging questions in regards to″ANN″。 In our books in China?knowledge of

　　ANNits uses are very rare. Few people in China have studied this

　　topicconsequently?the materials that are available on ANN are limited. Working

　　on this difficult project?not only did Mr. Wang rise to the challenge?but he

　　went abovebeyond the call of duty to analyze his secondary sourcestest them for

　　accuracy in practice. In this way?he found mistakes in the book that we use. His

　　diligencehard work made me extremely proud of him.