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。
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。
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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