同时，将理论结果和实验结果进行比较，得到了样品中分离铜的有效比率。
Meanwhile, theoretical results are compared with experimental results so that the author can get the effective ratios of separate copper in samples.
他们分析了样品中铅、钠、铜，发现某些比率接近于地球外壳中的值。
They analyzed their samples for lead, sodium, copper and found that some of the ratios were close to the values found for the earth's crust .
他们分析了样品中铅、钠、铜，发现某些比率接近于地球外壳中的值。
They analyzed their samples for lead, sodium, copper and found that some of the ratios were close to the values found for the earth's crust .
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