The supervisor of the laboratory is beginning to get headaches and dizzy spells because she says it's dangerous to breathe some of the chemical smoke there.

实验室的主管开始头疼和头晕，她说在那里吸入一些化学烟雾是很危险的。

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Severe respiratory problems can result in anyone exposed to the smoke and burning chemical particles that rain down over an area the size of a football pitch.

烟雾弥漫，燃烧着的化学颗粒大量落下，所涉及的区域几近一个足球场大小；暴露其中，任何人的呼吸系统都可能遭遇严重问题。

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Within minutes of being inhaled into the lungs cigarette smoke causes genetic mutations linked to lung cancer, according to a new study in the Chemical Research in Toxicology.

最近的一项毒理学化学研究显示，几分钟之内，将香烟烟雾大量吸入肺部，香烟烟雾则产生与肺癌有关的基因突变。

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In their study, the researchers tested blood for cotinine,a chemical which is produced when nicotine is metabolized, so they got an objective measure of how much smoke the teenagers were exposed to.

VOA: standard.2010.03.04

The mayor assured city residents that the air is safe, despite lingering concerns over asbestos, chemical fumes and smoke.

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Sometimes the problem is temporary, the result of an environmental insult like cigarette smoke or chemical fumes.

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They then triggered them into action using a chemical called an interleukin, or cigarette smoke before adding resveratrol.

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