The blue crystals are additives that keep the lit cigarette burning by producing oxygen.

上面的蓝色晶体是能产生氧气使烟能持续燃烧的添加物。

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When you smoke, the burning of the cigarette creates something called carbon monoxide (CO) -- the same stuff that's created when your car burns gasoline.

当你吸烟，烟草燃烧产生CO——和你的汽车燃烧汽油产生的物质是同样的。

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He plucked the burning cigarette up from the mat.

他把点着的香烟从席子上捡起来。

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The lights of the skyscrapers below glow like burning cigarette ends through the murk of twilight.

BBC: Chicago��s celluloid city

British American Tobacco, the UK's biggest cigarette manufacturer, said it had no plans to introduce slow burning cigarettes unless it were proven beyond doubt that the cigarette would self-extinguish.

BBC: Smokers

She nodded at my grandfather while pointing the burning tip of her cigarette at me.

NPR: Excerpt: 'City of Thieves'