A study in the US has identified the prime factors that drive the fizzy plumes from Coke bottles: the roughness of the sweet and how fast it plummets to the bottle's base.
Theories abound as to why this happens, with some bloggers speculating that it is an acid-base reaction because Coke is acidic.
一些blogger们深思后得出了解释这一现象的原因的理论——这是种酸碱反应，因为可乐是酸性的。
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Measurements of the pH of the Coke before and after the experiments showed that its acidity did not change, ruling out the idea that a simple acid-base reaction drives the fountains.