The U.S. Geological Survey (USGS) maintains an online database of fly ash-based uranium content for sites across the U.S..

美国地质调查局(usgs)拥有一个全美浮尘铀含量的在线数据库。

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Radon gas in the air is present worldwide, its concentration depending on the highly variable uranium content of the soil.

在世界各地，空气中都存在氡气，其浓度取决于土壤中差别极大的铀含量。

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The rationality of the conversion coefficient (K) formula affects the analytical quality of uranium content of the ore from underground mining and the sorting quality.

换算系数(K)的公式是否合理，直接影响出窿矿石铀含量的分析质量和矿石的分选质量。

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This is not because of any gold or uranium content but rather because of the copper content.

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