Each sample gives a different estimate of the amount of mineral underground.

从每个样本都能估计出地下不同的矿物水平。

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At minimum, prepare the amount required to constitute a sufficient sample size.

制备成样品尺寸符合最小准备数量要求。

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At minimum, prepare the amount required to constitute a sufficient sample size.

制备成样品尺寸符合最小准备数量要求。

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