The research on characteristic of the all-sky background brightness on day is developed. The sky background brightness is measured, the measurement data is analyzed.

开展了白天全天空背景亮度特性研究。进行天空背景全天候测量，开展了测量数据的分析与处理；

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The best signal depends not only on its brightness but also on how well it contrasts with the background against which it must be seen.

最好的信号不仅取决于它的亮度，还取决于它与背景的对比度。

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Objects and background should vary in brightness or saturation, in addition to hue, and color text on color backgrounds should also be avoided when possible.

图形和背景除了色调不同外，饱和度和亮度也应有区别。如果可能，应尽量避免在彩色背景上运用彩色文本。

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With Live Image Control, real time adjustments to motion control, brightness control, Active D-Lighting and background focus are seen on the LCD screen or the electronic viewfinder prior to capture to help ensure the user's creative vision is fulfilled.

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In my harsh tablet battery test, where I play a constant loop of video with the screen set to 75 % brightness and Wi-Fi on to retrieve email in the background, I got almost exactly five hours, which is Asus's official battery life estimate.

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In my battery test, where I keep the screen at 75% brightness, leave the Internet connection on and email collecting in the background and play videos back to back, the Nexus 7 lasted 10 hours and 44 minutes.

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