Only if the price of electricity were to triple would the amount of electricity used to generate light start to fall by 2030.

只有电价增至三倍，用于照明的总耗电量到2030年才会开始下降。

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When we consider the nightly lifestyle of these bats, we will see they have to be sensitive to the changing light levels because this is how they sense when to start hunting.

当我们考虑这些蝙蝠的夜间生活方式时，我们会发现，它们必须对不断变化的光线水平保持敏感，因为这是它们感知何时开始狩猎的方式。

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The light, about one thousandth of the amount needed to read by, is just a start.

光线，大约是阅读所需数量的千分之一，仅仅是一个开始。

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He's also decided to give up leadership in Light up the World Foundation to start a company in India that will develop a more energy-efficient and cheaper lighting system that he hopes will bring even more light to the world's poor.

VOA: standard.2009.12.13

Absorption is just the opposite of emission, so instead of starting at a high energy level and dropping down, when we absorb light we start low and we absorb energy to bring ourselves up to an n final that's higher.

吸收就是发射的逆过程,与从一个高能量到低能量不同，当吸收光时，我们从低能量开始,吸收能量到一个更高的能量。

麻省理工公开课 - 化学原理课程节选

Entities like ARPA-E and Ultra Light Start-Ups serve to increase the velocity of that change, by exposing good ideas to financial backing and experienced management.

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Maybe, with a little nudging, one by one, flickers of light will start to burn in their heads.

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Ken: Analysts say the settlement over the robo signing scandal has given the banks a green light to start a wave of foreclosures that will make an already oversupplied housing market worse.

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