The act of pouring will generate foam in beer, but even once the beer is poured, dissolved gas, chiefly carbon dioxide, will break out into small bubbles at nucleation sites along the glass wall.

倒啤酒的时候也会起泡，不过即使啤酒已经倒好了，溶解在酒里的气体，主要是二氧化碳，就会跑出来并在玻璃杯壁的成核处变成小气泡。

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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.

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。

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Getting beer into its glass with its carbonation intact and the correct volume of foam while achieving a nice visual presentation is an art form that takes some practice.

把啤酒倒入酒杯，在完整保留碳化作用和恰当泡沫量的同时还要获得良好的视觉效果，这是一门需要经过一番实践才能练就的艺术。

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Less successful but still profitable is Pittsburgh Corning, a joint venture with PPG Industries, that makes foam glass insulation and architectural glass blocks.

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After completing the costume, made mostly of glass fibre and foam, photos of it were posted online and they have been shared by people on social networks around the globe.

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