宋人别集,经过千百年流传,今日所存,只是宋代刊行过的一小部份,然而犹有五百余种,不可谓不富。其中大多数集子曾为后人再梓,有多种版本传世,虽优劣不一,对于保存古籍,终算有功。也有一些集子未尝重刊,或虽经重刊,亦多已失传,所幸尚未完全泯灭,天壤间或存一本,或寥寥三两本,——前者称孤本,后者称罕见本或稀有本。近代以来,随着科技的进步,不少孤本、罕见本已 Song do not set, after thousands of years of popular, save today, only a small part of the Song Dynasty, however, there are still more than 500 kinds, can not but rich. Most of them have been reborn for future generations, there are many versions handed down, although the advantages and disadvantages, for the preservation of ancient books, finally meritorious. There are also some books that have not been read, or have been lost again, though they have been reprinted. Fortunately, they have not yet been completely destroyed. There are only a handful of books in the world, or only a few of them, or two or three copies. The former is called the solitary book while the latter is called rare books or rare books . Since modern times, with the progress of science and technology, many solitary people are rare