The line number displayed may not always be where the actual error originated.

错误消息中显示的行号不一定是出现错误的实际位置。

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This construct is used to return to the calling application the actual error that caused the statement to fail, as shown in Listing 17.

该结构用于将实际的错误返回给调用应用程序，这个错误致使语句执行失败，如清单17所示。

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As an alternative, you can catch this exception directly in your code and handle it some other way (perhaps printing out the actual error message along with usage information, for instance).

一个替代的方法是，您也可以在代码中直接捕捉这个异常，并且用其他方式处理异常(例如，可能会与使用信息一起输出真正的错误消息)。

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She also said it would be too late to reverse course this year unless there was an actual error in the calculations.

WSJ: New York City Gifted-and-Talented Program's Math Is Questioned

Another common example might involve an application for regulatory permission to market a new pharmaceutical, where there is an arguable error or even falsehood, but where the officer has no actual knowledge of the error or falsehood.

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Traders factored in a margin of error and when the actual numbers came out above the forecast numbers, stocks were sold.

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