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数学家教你如何泡出一杯完美的咖啡
source link: https://tech.sina.com.cn/d/v/2020-03-07/doc-iimxxstf7088092.shtml
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文章来源：原理爱喝咖啡的朋友们，是否都有过这样一个疑问：为何在家里煮的咖啡和在咖啡馆买的味道如此不同？有时，同一家店的咖啡可能在一周之内味道也会变好几次？你或许会猜，是不是因为咖啡师改变了咖啡的配方？但在一篇最近发表于《物质》杂志上的新研究
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