Some teams estimate the size of all of the items in their backlog prior to any development.

有些团队在任何开发之前都要对他们积压中所有条目的大小进行评估。

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Our very subjective estimate of this is shown in figure 2, in which the major points on the confidence curve correspond to the numbered items listed below the figure.

对此我们的非常主观的估计被显示在图2中，在图中在信心曲线上的主要的点与下面图中列出的被标号的条目是对应的。

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So we break these items down to clarify dependencies, understand the task better or otherwise bring the item down to a point where we can provide some sort of estimate.

因此我们把这些条目分解以更好的理清依赖关系、理解任务或是把条目分解到我们能提供某种估算的程度。

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Experts estimate the items taken could be worth "hundreds of millions of euros" if sold legally at auction.

BBC: Rotterdam Dutch art thefts lead to Romania arrests

By using the Family Spending Survey (FSS) to estimate a few key expenditure items, some individual household accuracy is lost.

BBC: NEWS

The first two items are fairly easy to estimate.

ECONOMIST: Discredited