There's never been a more competitive market than the Internet, and every day the marginal cost of digital information comes closer to nothing.
没有什么能比互联网产业更具竞争性，数字信息的边际成本日益趋零。
Bundling selling is a kind of popular method for selling information goods. And this method should be taken into account on the basis of low marginal production cost.
捆绑式销售是当前比较流行的信息商品销售方法之一，这种方法充分考虑了生产时的低边际成本。
The spot price of the reactive power contains rich information about the marginal operational cost of the power system. It's a good measure for computing the reactive power price on power market.
无功功率实时电价具有丰富的系统边际成本信息，是计算电力市场下的无功功率价格的一种较好的方法。
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