很多热衷者都知道，要想倒出一杯漂亮的泡沫满满的啤酒，他的杯子必须做到“啤酒干净”——也就是说不能有一点儿油渍或者皮肤的油，连指纹都不能有。

It is well known to enthusiasts that a glass must be "beer clean" -free of any grease or skin oils, including fingerprints-to support a good head of foam.

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此外，每天食用蔬菜、橄榄油、鱼、谷类和一杯红酒的人，其认知下降的概率更低。

Another find shows that people who have taken daily, vegetables, olive oil, fish, cereal and a glass of red wine had a slower rate of cognitive decline.

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研究者的工作始于两年以前，当Misra博士，一个重度咖啡饮者，留下一杯未喝完的咖啡，第二天发现咖啡上面覆了一层油。

The researchers’ work began two years ago when Dr Misra, a heavy coffee drinker, left a cup unfinished and noticed the next day that the coffee was covered by a film of oil.

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