亲爱的洪义： 

我知道只有两位科学家发表的论文超过900篇。第一位是著名的数学家Leonhard 欧拉。。。，第二位是Paul Erdoes。。。（以下读者自译)

其英文原文如下：

 News from Alfred

Dear Hong-yi,

I know only two men scientists who made more papers than about 900 as you. The first is the famous mathematician Leonhard Euler
born in Switzerland and the second, the Hungarian mathematician Paul Erdoes (over 1000 the most with coworkers). Erdoes (mutated
vowel, two primes over the 'o') was a little unusual. He did not have a fixed living place and travelled from one to another mathematician
and stayed there mostly for short time for coworking and possessed almost nothing.  Long ago, I read a book about him.

This for today. I wish you all good things.

Sincerely,
Alfred