Yeah, there's nothing quite like a steaming cup full of an addictive drug in the morning.

是呀，没有什么比得上早晨来一整杯热呼呼让人上瘾的毒品。

Well, the key neurochemical behind addiction is dopamine as all addictive drugs cause a massive rise in dopamine.

成瘾背后的关键神经化学物质就是多巴胺，正如所有成瘾药物都会导致巨量多巴胺上升。

Like all addictive drugs, it prompts a squirt of dopamine in the nucleus accumbens which gives users a surge of pleasure.

和所有成瘾性药物一样，酒精可以提升伏隔核中的多巴胺含量，使饮用者产生愉悦感。

That can happen with any addictive drug.

任何成瘾药物都可能发生这种情况。

Opium is a highly addictive drug made from poppies.

鸦片是一种由罂粟制成的高度成瘾性药物。

It may be possible to vaccinate people against addictive drugs THE idea of vaccinating drug addicts against their affliction is an intriguing one.

人们也许能通过疫苗来阻止成瘾药物的使用对药物滥用者进行免疫来对抗他们受到的折磨是一个吸引人的课题。

Yet, unlike the classic addictive drugs, Ecstasy does not produce physical withdrawal symptoms.

但和传统上瘾药不同，停止服用摇头丸后不会产生任何身体上的戒断症状。

And it is that smartphones come equippedwith some of the most addictive drugs that humanity has ever engineered.

智能手机配备了一些人类有史以来最容易上瘾的药物。

In this way, it is in fact an addictive drug, one that doctors recommend we all cut down on.

通过这种方式， 它实际上是一种令人上瘾的药物， 医生建议我们都减少使用。

And the reason I wanted to look at a legal drug that almost all of us are involved with, caffeine, is to look at why this powerful and addictive drug has been, for most of its history, celebrated.

我之所以想研究一种我们几乎所有人都接触过的合法药物，咖啡因， 是为了研究为什么这种强大且令人上瘾的药物在其历史的大部分时间里都受到庆祝。