Publishers have responded to the demand that they make their product free to readers by charging their writers fees to cover the costs of preparing an article.
为满足免费向读者提供文献的需求，出版机构通过向作者收费来负担其准备论文的费用。
2
It is determined by a number of factors including market share, competition, material costs, product identity and the customer's perceived value of the product.
它由一系列因素决定，这些因素包括市场份额、竞争、材料成本、产品身份和顾客认知的产品价值。
3
When product management wants to know how much it costs to build some set of features I just multiple the one of the figures in red by the number of story points the team has estimated.