For example, a screen reader cannot help a blind person read informational graphic images on a Web page unless the developer has provided alternative text for those images.

例如，屏幕阅读器不能帮助盲人阅读Web页面上的信息图像，除非开发人员为那些图像提供了选择性的文本。

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It is recommended to have alternate text on these buttons, instead of have the screen reader read the URL. Here is an image button (Go button), followed by sample code to create it.

建议在这些按钮上使用替代文本，而不是让屏幕阅读器读取url。

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The screen reader then renders that information using specialized text-to-speech hardware, software speech synthesizers, Braille displays, or some combination thereof.

然后屏幕阅读器利用专门的文本到语音转化硬件、软件语音合成器、盲文显示，或其他组合提出信息。

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By eliminating the need to retype text from print media onto the screen, Optical Character Reader saves users a great deal of time.

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