Dark body copy on white background and light body copy on black background are passive.

深色的字体点击右键触发白色背景而浅色触发黑色背景是消极的。

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The intent is to output just enough power from the flash to make the flash light falling on the main subject match or balance the ambient light falling on the background.

其目的，是使照在主体上的闪光灯输出光线恰与落在背景上的环境光线相均衡。

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Based on analysis on transmission property of red laser beam, impact from background light, attenuation and scintillation are discussed.

基于对红光激光束大气传输特性的分析，讨论了激光束传输过程中背景光干扰、大气衰减和湍流效应的影响。

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Above all, both narratives shine a stark light on poverty -- an aspect of Indian society that has increasingly been pushed into the background by a decade and more of upbeat headlines about the country's dramatic economic growth.

CNN: 'Slumdog' highlights India's forgotten poor