一棵大树,要知道它的年龄,从外观看,树干粗壮高大,自然就是多年生的。要准确测算它的年龄,只能看它的年轮。年轮是树的主干横断面显示的同心环形纹理。年轮的总数,大体相当树的年龄,年轮多,方知生命之旺盛。一个出版社也有它生命的年轮,这就是出版社的总书目。总书目逐年记录出版社的各类图书:书名、作者、出版时间、印次、印数、定价等。读总书目,可知晓该社从诞生时起,逐年出过什么书, A big tree, to know its age, from the outside, thick sturdy tree, nature is perennial. To accurately measure its age, can only see its annual ring. The ring is a concentric ring texture that is shown in the trunk cross section of the tree. The total number of annual rings, roughly the age of the tree, the annual ring, to know the strong life. A publishing house also has an annual ring of its life, which is the total title of the publishing house. The total bibliographic yearbook records all kinds of books in publishing houses: title, author, date of publication, impressions, impressions, pricing and so on. Read the total bibliography, you can know the club from its birth, the year out of what book,