That changed when a system of high-tech mirrors was introduced to reflect sunlight from neighboring peaks into the valley below.

当引入一套高科技的镜子，将阳光从邻近的山峰反射到下面的山谷时，情况发生了变化。

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Sleeping longer than you need to will weaken your sleep system, as you reduce your prior wakefulness, exposure to sunlight, activity levels, and your body temperature at a low for too long.

睡得比你所需应该睡的时间长了会减弱你的睡眠系统，当你降低了你先前的觉醒度，暴露于阳光中，你的活动水平和你的身体体温都处于低水平太久。

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Its model involves a two-mirrored system that directs sunlight down an optical rod onto a small (1 square centimeter) photovoltaic cell.

它的模型有一个双面镜像系统。该系统直接把阳光投射进一块小型(1平方厘米大小)光伏电池的光学感应棒上。

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The result, according to Dr Bermel's calculations, would be a system that converts 37% of sunlight into electricity.

ECONOMIST: Solar power

Areva bought the Mountain View, Calif. company Ausra, a company that has developed a system of reflectors that concentrates and directs sunlight to create steam and spin a turbine.

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But how much electricity a system can generate will depend greatly on the locations and the amount of sunlight available manufacturers tend to provide power generation numbers based on a set of standard parameters.

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