最近,我收到了日本图书馆学家加藤一英教授一封来信,随信还寄来了他著作的《图书馆学导论》中译本前言(中译者撰写)的日本文译本。虽然这是我同这位曾见过面的日本学者之间文交上的一段小事,但却凝结着学术上的友谊,特撰此短文以记, Recently, I received a letter from a Japanese library scientist Professor Kato Iyo, and I also sent a Japanese translation of the preface (written by a translator) in his book Introduction to Library Science. Although this is a minor event that I communicated with this Japanese scholar who had met before, it condensed my academic friendship and wrote this essay in mind.