Estimating with probabilities is one example of the quantitative approach.

估算概率就是定量方法的一个例子。

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The "round trip" approach to use case transactions shows its value in the case of estimating the complexity of user interfaces.

用例事务的“环形路线”方法，在估算用户界面复杂性方面显示出其价值。

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The use case points method is a well-documented approach for estimating software development activities.

用例点方法是一种估算软件开发活动的广泛记载的方法。

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The numbers could be even worse as statisticians said they chose a more conservative approach to estimating diet and lifestyle-related deaths, saying the factors might actually cause 500, 000 deaths annually, as much as cancer.

FORBES: Smart Money Still In Fat

Because of the challenges in the analysis, we approach the task of estimating the impact of the Recovery Act from a number of different directions, and supplement our estimates with those of numerous outside analysts.

WHITEHOUSE: Recovery Act Fourth Quarterly Report - Executive Summary