Because it usually exists in a metallic state, it was preferentially incorporated in Earth's core as the planet cooled and consolidated.

因为它通常以金属的状态存在，并且在地球的冷却和固结的过程中，会优先合并到地核中。

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The process of heat treating is the method by which metals are heated and cooled in a series of specific operations that never allow the metal to reach the molten state.

金属热处理过程其实是一系列具体的操作，通过这些操作加热与冷却金属，但加热时进行控制，使得金属不达到熔融的状态。

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However, as the universe expanded, cooled, and went from a disorderly state to an orderly one, it reached a point where very small fluctuations created very large changes.

但是随着宇宙不断膨胀冷却，从无序变得有序，一个小小的波动就足以造成巨大的变化。

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The team that has done this for Planck's data says the map is an elegant fit for the standard model of cosmology - the idea that the Universe started in a hot, dense state in an incredibly small space, and then expanded and cooled.

BBC: Planck satellite: Maps detail Universe's ancient light