With rare exceptions such as a pure quartz sandstone, every rock contains detectable amounts of abundant metals.

除了象纯石英砂岩等少数例外，每种岩石都含有若干可检出的富有金属。

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With rare exceptions such as a pure quartz sandstone, every rock contains detectable amounts of abundant metals.

除了象纯石英砂岩等少数例外，每种岩石都含有若干可检出的富有金属。

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