If your smoke detector is working properly, the red light should be on.

如果你的烟雾探测器运作正常，红灯应当亮起。

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Do the following to ensure the safe operation of your smoke detector: if your smoke detector is working properly, the red light should be on.

为确保您的烟雾探测器的安全运行，请执行以下操作：如果烟雾探测器正常工作，则红灯常亮。

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RED flames shimmer behind a thick shroud of smoke at the Ras Laffan gas plant in Qatar.

在卡塔尔的拉斯拉凡天然气加工厂内，烟雾笼罩下的红色火焰微微发亮。

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The Italian display included tight formations of jets with contrails in the red,white and green of the nation's flag, the smoke forming hearts, crosses,spirals and more.

VOA: standard.2009.11.15

The red brick and stone, the smoke and soot, and the sounds and smells of Old Shanghai provide sharp relief to the shiny new Pudong financial centre across the river.

BBC: Reliving Shanghai��s 1930s past

They have built an imaging system that uses an infra-red laser to penetrate areas of thick smoke and flames.

BBC: fire fighting

He saw things he recognized but his brain, befuddled with chemicals released by fear, couldn't locate the words to describe them: the twin stacks spewing plumes of dirty white smoke, the abandoned custom's station with a faded red star painted above the door, the line of white-washed bee hives on a slope near a copse of stunted apple trees.

NPR: Excerpt: 'Legends'