Dear Sir or Madam,
尊敬的先生或女士：
I am writing to you to recommend one of my best friends, Zhou Botong, for this post.
我写信是为了推荐我最好的一个朋友周伯通申请这个职位。
With his outstanding leadership and cheerful personality,
由于他拥有杰出的领导能力和开朗的性格，
he was elected chairperson of the Student Union of Fudan University several times.
他层多次当选复旦大学 学生会主席。
Busy as he was,he completed his major, teenage psychology,
尽管他很忙，但他完成了自己的专业—青少年心理学，
with an outstanding school record.
并且成绩优异。
Upon graduation he was assigned to be a
