VOA慢速英语:Love: A Chemical Explosion in Your Brain

symbol – n. something that stands for or suggests something else by reason of relationship, association, convention, or accidental resemblance; especially : a visible sign of something invisible <the lion is a symbol of courage>

affair – n. a romantic or passionate attachment typically of limited duration

euphoria – n. a feeling of well-being or elation : euphoria – adj.

tandem – n. in partnership or conjunction

dopamine – n. Biochemistry : a compound present in the body as a neurotransmitter and a precursor of other substances including epinephrine, acting within the brain to help regulate movement and emotion

to be smitten with someone – slang expression to be captivated and strongly attracted to someone <He was smitten with her beauty.>

circuit – n. a neuronal pathway of the brain along which electrical and chemical signals travel

erotic – adj. of, devoted to, or tending to arouse sexual love or desire <erotic art> : strongly marked or affected by sexual desire