溶洞像一个底下管道使熔融岩石从火山下端流走。
Lava tubes serve as underground pipelines, allowing molten rock to flow under and away from volcanoes.
在地球上，安山岩通常是板块的下沉使水混入地下熔融的岩石而形成。
On earth andesites typically form when descending tectonic plates mix water into subterranean molten rock.
其后，该工艺还包括在熔炼还原阶段使金属氧化物全部还原以及使金属熔融。
Thereafter, the method comprises completely reducing the metal oxides and melting the metal in a smelt reduction stage.
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