咖啡因是茶和咖啡这类饮品的活性成分。
Caffeine is the active constituent of drinks such as tea and coffee.
科学家发现咖啡里面的咖啡因和阿司匹林类的解热镇痛抗炎药成分能够对抗酒精或酒类饮料产生的化学物质。
They found the caffeine in coffee and the anti-inflammatory ingredients of aspirin and other painkillers reacted against the chemical compounds of ethanol, or pure alcohol.
全世界有140多家机构，包括美国的食品药物管理局(Food and Drug Administration)认为咖啡因是一种安全成分。
And more than 140 regulatory agencies throughout the world, including the U.S. Food and Drug Administration, consider caffeine a safe ingredient.
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