Should I slow down at a red light, a green light, or a yellow light?

我应该在红灯时、绿灯时还是黄灯时减速呢？

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Combining red, green and blue LEDs to produce white light has the potential to be more efficient, and the colour of the light could be tuned depending on mood or taste.

结合红绿蓝led一起生成白光有能被更有效利用的潜在可能，并且光的颜色还可以依据心情或者口味来调配。

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A quantum-dot display would work by arranging quantum dots that emit red, green and blue light in a grid-like pattern, and getting those dots to emit light directly.

量子点显示技术的工作原理是，通过将散发红光、绿光与蓝光的量子点排列为网状图案，并让这些量子点直接发光。

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One such project is called NewsFlash, and uses high-frequency red and green light to transmit data to the built-in camera on a receiving device -- in this case Samsung's Epic 4G.

ENGADGET: NewsFlash uses high-frequency light to transmit data from iPad to smartphone, we go hands-on (video)

Often, the stakeholder with the green- or red-light authority is not at the bargaining table.

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Like most corporate clients, people with the ability to green- or red-light litigation, move on to greener pastures.

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