十万个为什么·科学启蒙30篇（3）
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Soda Fizzes When You Open the Bottle
为什么可乐会冒气
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When I twist open a cold cola bottle, I hear a soft hiss and see bubbles rush upward.我拧开一瓶冰可乐时，会听到轻微的嘶嘶声，看到气泡迅速上涌。
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Those bubbles were trapped inside under pressure and now escape quickly into the air.这些气泡原本在压力下被困在瓶内，现在迅速逸散到空气中。
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If I shake the bottle first, more gas jumps out and foam spills over the top.如果先摇晃瓶子，更多气体会猛然冲出，泡沫溢出瓶口。
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My friend spills less by opening it slowly and holding it upright on the table.朋友开瓶时动作缓慢、瓶身竖直放在桌上，洒出的就少些。
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The fizz tastes sharp and refreshing, especially on hot afternoon picnics.气泡口感清爽微刺，尤其适合炎热的午后野餐。
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Diet sodas sometimes bubble longer because they contain different sweeteners.无糖汽水有时气泡持续更久，因为使用了不同的甜味剂。
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I pour it into a tall glass so the bubbles have space to rise without overflowing.我把它倒入高杯中，让气泡有足够空间上升而不溢出。
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Carbon dioxide gives the drink its lively feel, but it disappears if left standing too long.二氧化碳赋予饮料活力感，但静置过久就会消失。
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At parties, we chill bottles in ice water so the fizz lasts longer in each cup.聚会时，我们把瓶子泡在冰水里，让每杯饮料的气泡更持久。
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Even though it fizzes, I always sip it slowly to enjoy the cool, bubbly taste.尽管冒着泡，我仍小口慢饮，细细品味那份清凉与气泡感。