Anyone who has ever filed a defect report against a piece of software knows that a screen shot that actually shows the problem establishes more credibility than a written or verbal description.

提交过软件缺陷报告的任何人都知道实际显示问题的屏幕快照要比书面或口头的描述可信得多。

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But now the problem is many literatures based on secondhand data, and the description of report is not particular.

但一方面许多研究所使用的都是二手数据，另一方面得出的结论也不系统。

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