Dear Professor Smith,
尊敬的史密斯教授：，
Our school is planning to have a lecture on how to learn English effectively for middle school students next week and I'm writing to ask you to come and give a talk on English learning strategies. It will help us understand how to learn English in effective ways and also increase our interest in learning it, thus making us learn it actively. Do you think one and a half hours will be enough for such a lecture? Please let me know as soon as possible so that I can make arrangements.
我们学校计划下周为中学生举办一场关于如何有效地学习英语的讲座，我写信请你们来做一个关于英语学习策略的演讲。它将帮助我们了解如何有效地学习英语，并增加我们学习英语的兴趣，从而使我们积极地学习英语。你认为一个半小时听这样的讲座够吗？请尽快通知我，以便我安排。
Looking forward to seeing you and enjoying the lecture.
很期待见到你并享受讲座。
Best wishes.
最美好的祝福。
Yours,
你的，
Li Hua
李华
