nicotine 烟碱 - 搜索图片

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en.wikipedia.org
Nicotine - Wikipedia
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khoor.com
Learn About the Dangers of Nicotine & Tobacco - Khoor
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wiseGEEK
What is Nicotine? (with pictures)

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voice.ons.org
The Case of the Nicotine Nightmare | ONS Voice
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NPR
The FDA wants to regulate nicotine for the first time : NPR
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The Wire
Does Nicotine Protect Us Against the Novel Coronavirus? – The Wire Science
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commons.wikimedia.org
File:Nicotine-from-xtal-Mercury-3D-balls.png - Wikimedia Commons

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