如果你考虑冶金的方法你将会发现，它们需要高能的熔融、结晶处理和要特别处理排除与成品损失有关的掺杂物。这种方法可达到的质量与气相处置方法相比仍然是非常低的。

If you look at metallurgical methods you'll find that they need energy-intensive melting and crystallization processes and special treatments to remove dopants which are connected with yield losses.

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