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截止３月３１日的１９９９年第一季度，美国网络（或因特网）经济，即由在线商业各个部门产生的收入总和比去年同季增长６８％。预计，整个１９９９年度美国网络经济的总收入约达到５０７０亿美元（１９９８年为３０１４亿美元）。以上数据，由美国德克萨斯州立大学电子商务研?
As of March 31, 1999, in the first quarter of 1999, the U.S. Internet (or Internet) economy, that is, the sum of revenue generated by various businesses in the online business, increased by 68% over the same quarter last year. It is estimated that the total income of the U.S. network economy for 1999 will reach about 507 billion U.S. dollars (308.1 billion U.S. dollars in 1998). The above data, by the United States Texas State University e-commerce research?