平均大小为 3,131 平方英尺，标准偏差为 655 平方英尺（标准偏差是一个描述差异的统计量度）。
The average size is 3,131 square feet, with a standard deviation of 655 square feet. (Standard deviation is a statistical measure of variance.)
本次调查经特别设计，引入经济计量学方法，以克服在受援公司类型上的任何系统偏差。
The survey was specifically designed to support an econometric approach designed to overcome any systematic bias in the type of assisted firms.
沥青混合料的沥青含量偏差主要来自生产时的计量误差、配比偏差、拌和均匀性及检测时的试验误差，文章对这些影响因素进行了分析。
Asphalt content errors in asphalt aggregate mainly come from metering errors, grading errors, mixing homogeneity and measurement errors. These influencing factors are analyzed in the article.
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