Then the class begins in earnest with four screen regions defined in the layout element: one for the presenter in overview, one for the score, and two more for the left and right hands.

然后课程开始使用在 layout 元素中定义的四个屏幕区域：一个用于演示者概述，一个用于显示乐谱，另外两个分别用于显示左手和右手。

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Because of drawback of four-screen measuring system and two-screen velocity measuring method, an improved six-light-screen array is presented that is composed of six large area light screens.

弹丸着靶坐标和飞行速度以及飞行方向角是外弹道测试中必测参数，本文针对四幕光幕靶和双光幕测速系统的不足，采用六个大靶面光幕靶，构造出了两类六光幕阵列结构。

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Four big-screen, big-budget features, from 1978 to 1987, starred Christopher Reeve as the Man of Steel.

WSJ: The Superhuman Appeal of Superman | By Will Friedwald

Its Via Phone will have front- and rear-facing cameras and four-inch screen, while the Via Tablet will have a front-facing camera and eight-inch, high-resolution screen, according to the reports.

FORBES: Morning Tech Wrap: Facebook, iPhone, CES

Amazon's light guide technology precisely diffuses the light across the screen and only requires four LEDs to light the entire screen (unlike LCD screens which can use up to 50 LEDs).

ENGADGET: Amazon announces $119 Kindle Paperwhite with illuminated, capacitive touch display