【答案解析】[范例] This is to certify that Mr. Zhang Xiaolin, born in 1959, was enrolled in September, 1979 to Shandong University, Jinan, as a postgraduate on Mechanics of Materials. He had been studying there for three years and finished the course in August, 1981．The following is the report of the results in his examinations and tests. The scores in examinations and tests. Mechanics of Materials: 94 Material tests: Pass. Mechanical Analysis: 87 Debate: Pass. Graduation Thesis: Pass. Postgraduate School Shandong University [文章点评] 本文介绍了对方的出生年月、大学录取、毕业时间以及各科的成绩，并为这些情况做出证明。 [语言注释] “This is to certify that”意为“兹证明……”，这是证明信的常用句式；“The following is…”意为“以下是……”，这是证明具体内容的习惯用语。