who you are, your connection with the person you are recommending, why they are qualified and the specific skills they have。此外，还应该包括联系方式，以便用人单位可以了解、确认情况。
如果你的推荐信是要给某一个人的，你应该加上称呼，例如dear dr. smith, dear mr. jones，等等。如果你的推荐信非常general，你在称呼的地方写to whom it may concern 或者不写称呼也可以。
主要内容叙述清楚后，还应该加一个简短的总结。总结部分应该再简述一下你为什么要推荐这个人。可以写上i highly recommend the person，i recommend the person without reservation 或者其他类似的话。
Admission Office Registrar''s Office The University of Waterloo 200 University Avenue West Waterloo, Ontario, Canada N2L 3G1
Dear Admission Office:
I am writing to strongly recommend Miss/Mr. XXXX for admission into the famous University of Waterloo.
Through teaching and informal consultation, I had chances to get to know her/him academic potentials and her/him ideals before she/he left for Canada. In my opinion she/he can be reliably graded as one of the best undergraduates here in 2002 grade students with majors in our department. Miss/Mr. is apparently a very bright student, with special interests and enjoyment in mathematics especially in passionate and innovative ways of tackling and solving various problems in mathematics. Perhaps her/his present mathematics scores in Canada could support my view. She/he has very good observatory skills in experiments and can easily glean essence from complicated concepts, phenomena or conditions. Enthusiastic for novelty and creative thinkings and as evidence for leadership potentials, she can easily influence her/his classmates in both curricular and extracurricular activities, though only within not a long period before her/his transfer from this institution to another school in Canada, a brave move toward next stage of personal challenge and fulfilment. I was particularly impressed by Miss/Mr. XXX career goal of aiming for excellence in academic education and achievements in her/his chosen field.
Please do not hesitate to contact me if I can be of further assistance.
With best wishes.
XXXXXXX, Ph.D Professor Department of XXXXXX XXXXX University of Technology XXXXX, Shanghai 200000 People''s Republic of China 86-XXX-XXX XXXX (O) 86-XXX-XXX XXXX (Fax) XXXXXXXX@hotmail.com