One approach towards reducing electronic junk, including spam in e-mail and on the Web, is to assign a small cost to the act of sending mail, or posting information on a Web site.

减少电子垃圾（包括电子邮件和 Web 上的垃圾信息）的一种方式是给发送邮件或在 Web 站点发布信息的行为加上一些成本。

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Accurate and reliant product cost information is important for making a price, reducing the cost and selecting the combination of the product.

准确、可靠的产品成本信息对制造企业进行产品定价、降低产品成本以及选择产品组合等决策有着重要的意义。

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We can say that the main value of information technology is reducing cost, increase efficiency.

可以说降低成本、提高效率就是信息技术的价值所在。

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Over the last few years I have read a lot of economic and monetary history and assert that ALL periods of rapid economic expansion are driven by two fundamental processes: Reducing the cost of doing work and reducing the cost of information.

FORBES: My Top 10 Economic Worries

The reason is that reducing the cost of work or information has leveraged impact through the entire economy.

FORBES: My Top 10 Economic Worries

The authors suggest another force is also reducing migration: the plummeting cost of information.

ECONOMIST: Free exchange