所有的现代操作系统都提供一个基本的屏幕放大器。
All modern operating systems provide a basic screen magnifier.
视力低下的人看屏幕有困难，他们使用屏幕放大器来选择并放大一部分。
People with low vision have difficulty seeing the screen and typically use a screen magnifier to select and enlarge portions of it.
这就意味着屏幕放大器不能象本机应用程序那样在输入焦点中跟踪发生的改变。
This means the screen magnifier cannot track changes in input focus in the same way as with native applications.
屏幕放大器（Screen magnifier）为视力低下的人放大屏幕上的信息。
Screen magnifiers that enlarge information on the screen for people with low vision.
测谎仪包括计算机主机，受试屏幕与音响的设备，应答按钮，应答麦克风，及脑波电极与前置放大器。
The lie detector includes host computer, testing screen, audio and video instrument, answering button keys, answering microphone, brain wave electrodes and pre-amplifier.
测谎仪包括计算机主机，受试屏幕与音响的设备，应答按钮，应答麦克风，及脑波电极与前置放大器。
The lie detector includes host computer, testing screen, audio and video instrument, answering button keys, answering microphone, brain wave electrodes and pre-amplifier.
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