再过个多月，我们就要迈入二十一世纪。二十一世纪，将是一个全新的经济时代。那么，新经济时代究竟新在哪里呢 ?　　人类几千年的经济活动差不多都遵循一个原则，首先生产出产品，然后销售产品。销售产品所得与生产产品的成本之差就是利润。因此，决定你赚钱多少的关键是两个? In another month and a half, we are about to enter the 21st century. The 21st century will be a brand new economic era. So, where is the new economic era? Human beings for thousands of years of economic activity are almost always follow a principle, first produce products, and then sell products. The difference between the cost of selling a product and the cost of producing the product is profit. So, the key to determining how much you earn is two?