This is easily done by including all the user interface controls for a screen inside of a separate element.

这很容易实现，只需将一个屏幕的所有用户界面控件包含在一个单独的 元素中。

youdao

These values, which we can also call politeness levels, specify what a screen reader should do when the element value is updated.

我们也可以将这些值称作“礼貌级别”，它们指定了当元素值更新时屏幕阅读器的响应操作。

youdao

Every element on the screen that has no direct semantic or obvious structural character can be misunderstood as a navigational control.

屏幕上的每一个元素并没有直接或明显的结构性特征，都有可能被误解为导航控制。

youdao

The artists at Legend3D began by studying every shot in the film and mapping out each element on screen in order to create a realistic sense of depth.

ENGADGET: Top Gun Blu-ray 3D details revealed, comes home February 19th after IMAX 3D run

Xbox viewers can also access additional Academy Awards information on a smartphone or tablet with the free Xbox SmartGlass app, bringing a second screen element to the Oscars.

FORBES: Why Ben Affleck's Argo Should Win The Best Picture Oscar

Switching involves looking at an element of the screen and giving a big blink to select -- the display seems adjusted in such a way that normal blinks won't trigger it, so you're less likely to accidentally set something off.

ENGADGET: Haier's Eye-Control TV set, we go eyeballs on (video) HD