Bats have an engineering problem: how to find their way and find their prey in the absence of light.

蝙蝠们遇到了一个技术上的难题：如何在没有光线的条件下认路和捕食。

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However using light to find one's own way around requires vastly more energy, since the eyes have to detect the tiny fraction of the light that bounces off each part of the scene.

然而，利用光来找到自己的方向极大地需要更多的能量，因为眼睛必须检测从场景的每个部分反射的光的极小部分。

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He was famous for painting flowers,buildings and the natural environment in a way that explored color and the changing effects of light.

VOA: special.2010.03.24

Suppose, for example, that, the right way to live, in light of the facts about death, is to live life to the fullest.

假设，例如，生活的正确的方式，鉴于关于死亡的事实，是尽情地活。

耶鲁公开课 - 死亡课程节选

"Some of these inventors have been designers of the human genome sequencer, incredible technologies around focusing sound in the same way have been able to focus light with lasers, health technologies like the stair-climbing wheelchair and a portable dialysis machine,".

VOA: standard.2009.12.18

This does not involve holographic images of the usual sort, but is a way of projecting beams of light wherever they are needed.

ECONOMIST: Monitor

Organic polymers are a fundamentally new way of converting electricity to light, a process at the heart of all displays--TVs, computer monitors, cell phone screens.

FORBES: Seeing the Light

The computer maker managed to simultaneously transmit 55 wavelengths and came up with a way of amplifying the light signals every 50 kilometers, since light pulses degrade over long stretches and must be strengthened.

CNN: THE INTERNET