求翻译：在20世纪80年代，人们普遍认为企业有产品就有客户，20世纪90年代则认为企业有广告就有销路，而到了21世纪，由于市场经济的飞速发展，经济运行的模式发生了巨大的变化，现代经济具备了一些新的特征是什么意思？

In the 1980s, companies have products that people generally believe that there are customers in the 1990s is that companies have advertising on the marketable, but the 21st century, the rapid development of market economy, the mode of economic operation has undergone tremendous changes modern econom

In the 1980s of the 20th century, it is generally believed that there is a product for enterprise customers, there are 20 enterprises in the 1990s were of the view that there is advertising on the sales, but in the 21 century, because of the market economy, and the operation of the economy of the ra

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In the 1980 of the 20th century, it is generally believed that enterprise has a product to the customer, in the 1990 of the 20th century, the enterprise is considered advertising sales, and by the 21st century, due to the rapid development of market economy, economic operation mode of great changes

正在翻译，请等待...