铀

In this paper, the distribution, abundance and occurrence states of U in mantle xenoliths are studied by ~(235)U fission track method, and the movement of mantle fluids is revealed by means of U-tracer, which is a representative of incompatible elements in the mantle.

在此基础上进一步把铀作为不相容元素群的示踪剂，指示地幔流体在深部地幔岩中的活动轨迹。

He was to stop making plutonium as well as suspected work on uranium.

而金正日要停止钚以及备受怀疑的铀的研究。

He was to stop making plutonium as well as suspected work on uranium.

他曾愿意停止生产钚以及进行可疑的铀浓缩活动。

He was to stop making plutonium as well as suspected work on uranium.

他曾经停止了钚的生产，包括曾被怀疑生产过的金属铀。

He was to stop making plutonium as well as suspected work on uranium.

他停止生产钚和可疑的铀计划。

It avoided the thorniest issues of nuclear proliferation and did not attempt to advance Mr.

一些人批评说，峰会没有为武器级别铀和钸的处置达成实质性的承诺。

Having reviewed a large number of relevant literature in detail, combined with some research achievements at sandstone type uranium deposits in China and abroad, The authors try to make an overview of the role of sulphides, particularly the pyrite, in the reduction, precipitation and concentration of uranium at the redox front of sandstone type uranium deposits.

作者通过大量的相关文献的调研，结合国内外在砂岩型铀矿研究方面取得的成果，对硫化物，特别是黄铁矿在砂岩型铀矿氧化－还原前锋线附近铀还原、沉淀和富集过程中所起的作用提出了自己的认识。

What will it take for Europe, America, Russia and China to agree on the sort of sanctions that might oblige a nose-thumbing but not yet nuclear-armed Iran to obey the council's demand to stop enriching uranium and messing with plutonium, from which its own future bombs could be made?

对欧洲，美国，俄国和中国来说，什么会使他们采取一致行动制裁伊朗，迫使蔑视别人但还不具备核能力的伊朗遵守安理会决议停止铀浓缩活动？这些活动会使伊朗在未来能制造核武器。

The relationships between the intensity of gamma-radiation and radi- oactive elements content of ore bed have proposed,and made an exhaustive analysis of the various methods solving the uranium content(iteration, inverse matrix and the decomposition suggested by author).

文中提出了比较完整的伽玛强度与矿层中放射性元素含量的关系式，对求解铀含量的各种方法(迭代法、逆阵法和作者提出的分解法)作了详尽的分析，列举了不同类型铀矿床伽玛测井实际资料的电算对比结果。

He refuses, however, to own up to known imports of equipment for enriching uranium (another potential route to a bomb) that scuppered the very first Yongbyon deal.

然而，他拒绝承认外界已知的铀浓缩（制造核弹的另一个潜在途径）设备进口的事情，这就使宁边协议一开始就完蛋了。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。