ActionError encapsulates an individual error message.

ActionError封装了单个错误消息。

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The optimized results showed that the average relative error of this combination is 1.3%, and the individual error is also able to meet the requirements of less than 5%.

优化结果表明，该组冲击参数的平均相对误差为1.3%，各单项误差也均满足小于5%的指标要求。

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Mowbray said it was an individual error that cost Celtic dear, the goal coming after a pass from Stephen McManus went astray.

BBC: Mowbray frustrated by early goal

Hull showed the greater endeavour and desire in the opening stages, but their their opening goal was very much a result of individual error rather than attacking brilliance.

BBC: Hull 2-2 Man City

Without margins of error for individual readings, there was no way for the Harvard researchers to compute a margin of error for their overall findings.

WSJ: Spreadsheet Slips Not Economists' Only Problem