亲爱的herthwell教授：
many thanks for your kind hospitality and the honor you showed me during our delegation’s recent visit to your university.
it was nice of you to introduce me to so many famous professors and celebrated scholars at your university.
we had a safe and sound trip home.
now we have resumed our work.
十分感谢你的盛情款待，以及在你在我们的代表团最近访问你的大学时对我们的尊敬.多谢你把我介绍给那么多您大学里的知名教授和著名的学者.我们已经平安愉悦得回到家了.
此刻，我们继续我们的工作了.
meanwhile， i hope you will someday pay a short visit to our university and give us some lectures on modern western economics.
同时，我期望有一天你能够对我校进行一个短暂的访问并给我们开一些关于现代西方经济学的讲座.
please have no hesitation in writing to me if you want me to do something for you in china.
如果你要我为你在中国做些事情，请不要犹豫，写信给我.
best wishes，
li dong