Instead, they must use ATs such as screen readers to interpret information on the screen in a meaningful way.
取而代之，他们必须使用诸如屏幕阅读器的AT，以有意义的方式解释屏幕上的信息。
2
Screen readers and other ATs use operating systems, programming platforms, and application resources to provide a specialized input or output method for the user.
屏幕阅读器和其他AT使用操作系统、程序设计平台，和应用程序资源来为用户提供专门的输入或输出方法。
3
Operating systems also supply ATs for assisting users with hearing impairments.