1、I am writing in my capacity as the dean of the Department of Life Science, Kurt University to invite you as a visiting professor of our department.

【译文】作为库特大学生命科学系的系主任，我给您写信是想邀请您做我们系的客座教授。

【分析】此句用于邀请信的开头，正式并且礼貌地邀请对方做本系的visiting professor“客座教授”。也可以使用 possibility 将句子替换为 I am writing…to inquire the possibility of inviting you to…，或者用 wonder if 句式更加婉转地表达邀请之意，即I wonder if there is any chance for you to... 。

2、You have great achievement and outstanding academic status in the field of biochemistry and we are honored to ask you to be our visiting professor.

【译文】您在生化领域取得了重大成就，具有突出的学术地位，我们很荣幸能够邀请您做我系的客座教授。

【分析】此句常用于信件开头发出邀请后说明邀请此人的原因。类似的表达方式还有We know that you…。