One of the major criticisms of the museum was that it was too dark. Now, new skylights in the roof let the sun shine in.

原先人们对该博物馆最主要的一个批评就是它太暗了，现在，太阳光直接从博物馆顶上的新安装的天窗照射进来。

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What is more, a white roof can cost as little as 15 percent more than its dark counterpart, depending on the materials used, while slashing electricity bills.

不仅如此，白色的屋顶除了能让电费帐单大大降低，相比于黑色的屋顶，它们的制造费用仅仅多出15个百分点，还要视具体使用的材料而定。

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The saffron swan of dawn, slow swimming up the sky-river between the high roof-banks, bent her neck down through the dark air-water to look at him staggering below her, with his still smoking wick.

破晓的金色天鹅在高大屋顶之间的天河中缓缓游弋而来，弯下脖颈，穿过如水般的黑夜看着他在下面蹒跚而行，灯芯儿还冒着烟。

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Dark roof tops hold in more than eighty percent of the energy from sunlight.

VOA: special.2009.06.19

The twenty-two men rested until dark, listening to rain hit the roof of the farm house.

VOA: special.2009.06.18

Instead of replying, she exhaled as if she were getting rid of something, and threw her head back, staring up through the dark at the felt lining of the roof.

NEWYORKER: The Swan