求翻译：在我们学校大理堂有个英语讲座，是由美籍教授Mrris为我们讲，讲座的内容是中外文化的差异。希望大家都来听讲。学生会主席是什么意思？

Dali Hall in our school have a lecture in English, was by the American Professor Mrris as we speak, lecture contents of cultural differences. Hope everyone is to listen. President of the Student Union