铀的

"Euxenite:a lustrous, blackish-brown rare -earth mineral consisting primarily of cerium, erbium, titanium, uranium, and yttrium."

黑稀金矿：一种光亮的棕黑色稀土矿石，主要由铈、铒、钛、铀和钇构成。

It may cause the nucleus of the fissile U-235 atom to split into two parts.

轰击可以使可裂变的铀-235原子核裂成两部分。

Fluosilicic acid,which is the byproduct from phosphate fertilizer factory,reacts with ammonium hydrocarbonate to obtain ammonium fluosilicate,then reacts with ammonium carbonate to form settled SiO 2,after filtration,water washing,drying and calcining,high purity SiO 2 with less than 10×10 -6 metal impurity and less than 10×10 -9 uranium and thorium respectively is made.

由磷肥厂副产氟硅酸同碳铵反应得氟硅酸铵，再和碳铵反应生成SiO2 沉淀，经过滤、水洗、干燥、煅烧得高纯SiO2 ，其金属杂质总含量小于 10× 10 -6，含放射性元素铀和钍各小于 10× 10 -9，通过实验获得了适宜的工艺条件，反应温度 70℃～ 80℃，反应时间 1 5h～ 2 0h ，配料比n(NH4HCO3 )∶n(NH4 2 SiF6 =4 4。

So little is known about it, because there is only about 1 ATOM OF FRANCIUM IN A CUBIC FOOT OF URANIUM ORE!

对它所知甚少，因为在1立方英尺的铀矿石中，仅有1个钫原子！

Second, a number of electronprobe tests indicate that francolite extensively coexists with uranium minerals.

富铀矿体铀、磷胶体共沉淀机理很好解释了群脉型矿床中存在富铀矿体的客观事实。

Uranium in the aquatic environment : proceedings of the International Conference Uranium Mining and Hydrogeology III and the International Mine Water Association Symposium, Freiberg, Germany, 15-21 September 2002 / Broder J.

水生环境中的铀：第3届国际铀矿开采和水文地质学国际会议及矿坑水协会讨论会会议录。

This combination of uranium and hydrogen is called a " hydrogen bomb ".

这种铀和氢的结合，叫做"氢弹"。

An short introduction of the progress on the hydrometallurgy of uranium is given.

本文重点介绍了十年来国内铀水冶科学技术的新进展。

S: Soil covering is an important measure in remedial action for uranium tailings impoundment.

在铀尾矿库补救行动中，库面上覆盖土层是其中的一项关键措施。

C and O can ingress into the surface layer of uranium sample.

碳和氧进入到了铀表层的一定深度范围。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。