事实上，氩元素的浓度相当高，如果房间里有电灯泡被打破，灯丝却还可以继续发亮。

In fact, the argon would be so thick that if a light bulb inside the room were to break, the filament would keep glowing.

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当我们游览菲律宾的农村时，看见许多不同种类的灯，有电灯、蜡烛和用电池的光管。

In our travels around the rural Philippines, we've seen many different types of lights, from electric lights and candles to battery-powered fluorescent bulbs.

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在这个有电灯和通宵工作的时代这也许并不令人惊讶。 但是这份报告的共同作者大卫•萨姆森说，睡眠的这种变化早在我们发明人工照明之前就开始了。

That might not seem surprising in this age of electric lights and round-the-clock activities, but co-author David Samson says this shift began long before we developed artificial lighting.

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