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Caffeine

释义 Definition

咖啡因：一种天然存在于咖啡豆、茶叶、可可等中的兴奋剂，能刺激中枢神经系统，使人更清醒、注意力更集中；过量可能导致心悸、焦虑或失眠。（也可指含咖啡因的饮料/食品中的“咖啡因成分”）

发音 Pronunciation

/kfin/

例句 Examples

I try not to drink caffeine after 2 p.m.
我尽量在下午两点后不摄入咖啡因。

Because she is sensitive to caffeine, even a small cup of coffee can keep her awake all night.
因为她对咖啡因很敏感，哪怕一小杯咖啡也会让她整晚睡不着。

词源 Etymology

caffeine 来自法语 caféine，与 café（咖啡）相关；其词根最终可追溯到表示“咖啡”的外来词来源。作为术语，19世纪被用来命名从咖啡中分离出的这种刺激性化合物。

相关词 Related Words

文学作品示例 Literary Works

H. G. Wells, The First Men in the Moon（作品中出现关于“咖啡/咖啡因提神”一类的表述与语境）
Anthony Burgess, A Clockwork Orange（作品中出现与兴奋剂/提神饮品相关的词汇语境，包括 caffeine）

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