It is rather a difficult issue for statistical agencies how to estimate price index accurately, while quality adjustment is one of those factors which influence the accuracy.

如何准确地计算价格指数成为困扰各国统计机构的一个难题，而质量调整是目前影响价格指数准确性的重要因素之一。

The average fan spends $25 – a conservative estimate based on ticket price and souvenirs.

平均球迷花费$25–根据票价和纪念品的一个保守估计。

A value model for a software product can be a formula or an algorithm that helps estimate the number of licenses that can be sold, at what price, over the product lifecycle.

一个软件产品的价值模型可以是一个公式或是算法，它帮助我们估计在产品的生存周期中可以以什么样的价格卖出多少产品。

The lower price is based on NASA's estimate of the cost for transporting a shuttle from Kennedy Space Center to a major airport, and for displaying it indoors in a climate-controlled building.

低廉的价格是建立在NASA的估价上的，这些估价包括把航天飞机从肯尼迪航天中心运输到一个主飞机场，还有将其展示在一个气候可控制的建筑中。

This is an outside estimate of the price.

这是最高的估价。