名词
中文翻译：咖啡因的
同义词：
['caffeine', 'caffeine-containing']
例句：
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1.Caffeine is a stimulant that can help you stay alert during exercise.
咖啡因是一种兴奋剂，可以帮助你在锻炼时保持警觉。
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2. The coffee in the cup contains caffeine, which gives it its strong flavor.
杯子里的咖啡含有咖啡因，这就是为什么它有强烈的味道。
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3.Many people use caffeine to improve their focus and concentration.
许多人使用咖啡因来提高他们的专注力和注意力。