According to the analysis of the selection of foreign books introduced by the national press in 2005, a total of 6,737 topics were introduced, of which 13.65% were natural sciences and 14.36% was economics. It can be inferred from this text:. ['oreign books that have academic value but have market risks are often coldly treated by domestic publishers.', 'The proportion of foreign advanced science and technology books is obviously low, and the number of humanities and social sciences is not only large, but also a certain type.', 'Classical classics of foreign literature, because there is no need to buy the copyright, the market has always had a stable readership, so it has been repeatedly published.', 'The introduction of natural science books requires higher translation quality and longer cycles, resulting in a lower proportion of translation and publication.']