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。
At this altitude, atmospheric pressure is considerably less than at sea level, so the carbonated bubbles in beer escape more rapidly.
在这个海拔上，大气压远远低于海平面，所以啤酒里的气泡会被更快地释放出来。
A well-crafted beer produces a tightly knit, dense, uneven head comprised of small, uniform bubbles.
一杯优质的啤酒可以产生紧密浓稠的的泡沫，泡沫由很多细小一致的气泡组成。
A well-crafted beer produces a tightly knit, dense, uneven head comprised of small, uniform bubbles.
一杯优质的啤酒可以产生紧密浓稠的的泡沫，泡沫由很多细小一致的气泡组成。
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