求翻译：亲爱的Professorjnhnson，我是光明中学的学生会主席，李明，我想邀请你到光明中学作一个关于如何提高英文写作的讲坐，时间是9月25号下午四点，讲座45分钟，有15分钟和同学们交流，希望你能来是什么意思？

Dear Professorjnhnson, I'm a bright high school student union President, Li Ming, bright middle school I would like to invite you to make a speak sitting on how to improve English writing, time is September 25, lectures of 45 minutes, 15 minutes and the exchange of students, I hope you can come