The researchers studied wings under microscopes, against black backgrounds.

研究员对着黑色背景在显微镜下研究翅膀。

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The effects of blinking as a type of highlighting on visual search performance in white and black backgrounds were investigated.

视觉材料的呈现背景对闪烁突显视觉搜索绩效没有明显的影响，但在白背景下采用闪烁效果较好。

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Calculator typing window no longer takes the background color of the sketch you are in - thereby making typing on black backgrounds visible.

的计算器输入窗口不再需要对素描的背景颜色是-黑色的背景上，从而使打字可见。

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Improved photo layouts, even more beautiful with black backgrounds.

ENGADGET: Flipboard brings the noise in NPR-ified app update, Britta will be pleased

He urged the TDA to increase its target for recruiting teachers from black and ethnic minority backgrounds to 12% from 10.5%.

BBC: NEWS | UK | Education | City teachers could get more cash

Of the victims who gave evidence to the inquiry, 42% were described as white British and 28% were from black and ethnic minority backgrounds.

BBC: Uncomfortable truths of child exploitation in Britain