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。
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。
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。
This method is characterized by low determination limit, high precision, easy operation, high speed and wide range of determination being a ideal method for determining uranium content in ore samples.
该方法检出限低，精密度高，操作简单，分析速度快，测定范围宽，是测定铀含量的较理想的方法。
Some factors affecting the accuracy of uranium content determined by delayed neutron counting and methods to solve the problems are reported.
文章介绍了用缓发中子计数法测铀时遇到的一些影响测量结果准确度的因素和采用的解决办法。
The factors that result in large change of uranium content in different regions are also discussed.
并对各流域水体中铀含量存在差异的原因进行了讨论。
They reported the abnormal uranium content of waters issuing from tuffaceous rocks.
该理论认为，来自凝灰岩的地下水淋蚀铀。
Thorium ore, uranium ore, or mixed ore of uranium and thorium In which the rate of content weight uranium and thorium is higher than five-ten thousandths.
一钍矿物、铀矿物或铀钍混合之矿物，其含有铀、钍之成份重量比在万分之五以上者。
Thorium ore, uranium ore, or mixed ore of uranium and thorium In which the rate of content weight uranium and thorium is higher than five-ten thousandths.
一钍矿物、铀矿物或铀钍混合之矿物，其含有铀、钍之成份重量比在万分之五以上者。
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