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A meringue is really nothing but a foam. And what is a foam after all, but a big collection of bubbles? And what's a bubble? It's basically a very flimsy little latticework of proteins draped with water. We add sugar to this structure, which strengthens it. But things can, and do, go wrong.
蛋白霜其实就是泡沫。泡沫到底是什么，除了一大群泡沫?什么是泡沫?它基本上是一个非常脆弱的蛋白质网状结构，上面覆盖着水。我们在这个结构中加入糖，这就加强了它。但事情可能会出错，也确实会出错。