When people do something new or risky, a chemical (化学物质) in the brain creates a pleasant feeling.

人们尝试新鲜事物或是冒险性举动时，大脑中的某种化学物质会让人产生愉快感。

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Dopamine is thought to be the "pleasure chemical, " producing a feeling of bliss. Norepinephrine is similar to adrenaline and produces the racing heart and excitement.

多巴胺被认为是“快乐激素”，产生喜悦感；去甲肾上腺素类似于肾上腺素，导致心跳加速和兴奋感，据来自美国罗格斯大学的人类学家，著名的爱情研究者Helen Fisher所说，这两种化学物质共同引起喜悦感，充沛的精力，失眠，强烈的愿望，食欲的减退和集中的注意力。

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As we try to find chemical stimulants for desire and arousal one of the puzzle mysteries is how to weave a chemical feeling into a human response that can only be appropriate in some contexts.

我们试图发现化学兴奋剂能如同期望唤醒神秘宗教仪式一样是怎么编织一个化学感觉对于在某些场景中合适的人类反应。

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