一杯过滤咖啡含有的咖啡因大约是一杯茶的3倍，尽管从重量上看，干茶叶所含咖啡因的比例确实比咖啡豆高。
A cup of filter coffee contains about three times as much caffeine as a cup of tea, although dry tea leaves do contain a higher proportion of caffeine by weight than coffee beans.
每罐红牛饮料和一杯过滤咖啡在咖啡因含量上是相同的，并融合了其它有提神功效的成分，如牛磺酸和葡萄糖醛酸内酯，它会让你一振冲天的！
One can contains about the same amount of caffeine as a cup of filtered coffee, and combined with other energy boosting ingredients, such as Taurine and Glucuronolactone, it gives you wings!
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