When a lightbulb burns out, we rarely give it a second thought.

当一个灯泡烧掉了，我们很少会在它身上再去多费心思。

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This is the last Lightfair before new regulations governing lightbulb efficiency begin to take effect in the US in January, and there’s a real sense of history and urgency on the show floor.

这是在一月份美国颁布规定灯泡效率新法规之前的最后一次“灯市”，在会场上也可以感受到历史感和紧迫感。

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Obtain a lightbulb, a wire, and a battery.

取一个灯泡、一段导线和一节干电池。

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And when we talk about intensity in terms of units, we usually talk about watts, so if you change your lightbulb, usually you see the intensity in terms of watts.

当我们讨论强度的单位时，我们经常用瓦特，所以如果你更换灯泡，你通常会看到,以瓦特为单位的强度值。

麻省理工公开课 - 化学原理课程节选

It was the kind of lightbulb moment that seemed to give Pittsburgh a welcome energy boost.

WSJ: Penguins look to snap home funk against Devils

It weighs 45 pounds or so and takes 100 watts, a lightbulb-size power draw.

FORBES: Magazine Article

The firm makes kits, which consists of a battery, an LED lightbulb and a small solar panel.

BBC: TEDGlobal 2011: Simple tech aids developing world