A ceiling fan can lower a room's temperature by several degrees. Even something as simple as switching to compact fluorescent light bulbs can make a big difference in electricity bills.

安装一个室内温控器可以节省12%的电费，在天花板上安装吊扇可以降低几度室温，甚至使用节能灯泡都有助于显着减少电费。

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Earlier this year the House of Representatives voted to erect a "cap-and-trade" system, which would set a ceiling on such emissions and lower it each year.

在今年早些时候，美国众议院就投票建立起“总体管制与交易”体系，这将限制每个国家二氧化碳的最高排量并将其逐年递减。

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And ultimately, of course, the college graduation rate is likely to hit a substantially lower ceiling than that for high school or elementary school.

当然，最终大学毕业率很可能会触及一个比高中或初中毕业率低得多的最高值。

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The Diamondbacks wanted the one with a lower ceiling who displayed the traits they value.

WSJ: D-Backs Get Down and Dirty

Numerous analysts previously said they anticipated a temporary correction lower in gold when the deficit-ceiling impasse ended.

FORBES: Gold Underpinned By Downgrade Worries, Economy, European Debt Issues, Central-Bank Buying

These shrinking numbers either mean that the glass ceiling is thicker and lower than we imagined, or that younger women on the way up are finding a way out or, quite possibly, both.

FORBES: Career Women And The New Definition Of Success