Some rocks from volcanoes break down to form black sand.

有些火山岩被撞碎后会形成黑色的沙。

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Over time, lava and ash break down to form fertile soils ideal for agriculture.

随着时间的过去，岩浆和火山灰分解形成肥沃的、农业生产的理想土壤。

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If we take hydrogen peroxide in the liquid state, it can break down to form water and oxygen.

如果我们有一些液态的过氧化氢，它会分解成水和氧气。

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They make proteins including oxygen-carrying blood substances, antibodies to protect against disease, and substances that break down sugar.

VOA: special.2009.12.08

If we take hydrogen peroxide in the liquid state, it can break down to form water and oxygen.

如果我们有一些液态的过氧化氢，它会分解成水和氧气。

麻省理工公开课 - 热力学与动力学课程节选

But it is a very handy way of thinking about, not just how to program, but how to break problems down into nice sized chunks.

但是它确实是一种很方便的思考方式，不仅仅限于编程序,在将程序分解为小部分时也很有用。

麻省理工公开课 - 计算机科学及编程导论课程节选

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