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地球上从岩石中发现自然铁的实例极为罕见。日本在历史上发现过两次均在火山岩中,从世界角度看,也以自火山岩中发现的为多。
Examples of the discovery of natural iron from rocks on Earth are extremely rare. Japan has been found in volcanic rocks twice in history, from the perspective of the world and also from volcanic rocks.