当前欧洲的出版界存在着两类主要的困难 :第一类困难是缺少每一个欧洲国家的单一来源的数据。所能得到的有关图书销售量 ,印数 ,购买者 ,销售结构等数字都是部分的和不完整的 ,这样对我们判明出版趋势就造成了困难。因此 ,与其他国家进行的比较只能是部分的或是基于一种推测得 There are two major types of difficulties in the current publishing world in Europe: the first type of difficulty is the lack of single-sourced data for each European country. What we can get is a partial and incomplete picture of the book sales volume, impressions, buyers, sales structure, etc. This makes it difficult for us to identify publication trends. Therefore, comparisons with other countries can only be partial or based on a presumption