The International Association of Scientific, Technical and Medical Publishers says that there are more than 2,000 publishers worldwide specializing in these subjects.

　　①The value of knowledge and the return on the public investment in research depends, in part, upon wide distribution and ready access.

　　②It is big business. In America, the core scientific publishing market is estimated at between $7 billion and $11 billion.

　　③The International Association of Scientific, Technical and Medical Publishers says that there are more than 2,000 publishers worldwide specializing in these subjects.

　　④They publish more than 1.2 million articles each year in some 16,000 journals.

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　　①知识的价值和公共科研投资的回报在某种程度上取决于广泛的传播和方便的获取。

　　②这是一个大产业。据估算，美国科研核心刊物的市场价值大约在 70 亿到 110 亿美元之间。

　　③国际科技与医学出版商协会称，目前全球有超过 2000 家的出版公司从事此领域的出版。

　　④他们每年在近 16，000 种刊物中刊登超过 120 万篇文章。