铀的

But an unexpected fact was noted: certain minerals (pitchblende, chalcolite, autunite) had a greater activity than might be expected on the basis of their uranium or thorium content.

但是一个意外的事实引起了我的注意：某些矿物质(沥青铀矿物质、铜铀云母或钙铀云母)的活性比根据其铀或针含量所判断的要高。

The phenomenon was first reported in 1896 by Henri Becquerel for a uranium salt, and it was soon found that all uranium compounds are radioactive due to the uranium's radioactivity.

放射性：某些类的物质自发发射辐射的特性。1896年贝克勒耳第一个报告在铀盐中发现了这一现象，不久发现由于铀有放射性，所以所有的铀化合物都是放射性的。

"Radioactivity: Property exhibited by certain types of matter of emit ting radiation spontaneously. The phenomenon was first reported in 1896 by Henri Becquerel for a uranium salt, and it was soon found that all uranium compounds are radioactive due to the uranium's radioactivity."

放射性：某些类的物质自发发射辐射的特性。1896年贝克勒耳第一个报告在铀盐中发现了这一现象，不久发现由于铀有放射性，所以所有的铀化合物都是放射性的。

It is suggested by our test work on radon mapping of geology that there is a good coincidence between the data got from gamma-ray spectrometer and radon monitor and the U、Th、Ra、K data got from indoor gamma-ray spectrometer and radiochemistry method; the data of gamma-ray spectrometer and radon monitor are also comparative to the 1∶20 ten thousand geochemistry data of U、Th、 Ra (calculated by the equilibrium coefficient between U and Ra) and radon concentrations measured by solid state nuclear track detector .

在国内首次利用地质勘探费用进行氡地质填图方法试验，该试验方法结果表明，利用国产的现场能谱仪、测氡仪获得的数据与室内能谱仪、化学法测得的铀、钍、镭、钾结果一致；与已有的1∶20万区域地球化学数据铀、钍、镭（由铀、镭平衡系数计算得出）、钾和固体核径迹累积法测氡数据具有很好的可比性。

The unusual feature of thiscompound can also be described in terms of infinite chains of B3O3 six-memberedrings sharing B atoms, which are all tetrahedrally coordinated by oxygen atoms.

例如，一维螺旋链结构的铀-有机配位聚合物[U3O732]-·H3O+，它的结构中存在由 U3O 构成的螺旋铀氧带。它也表现类似的铀酰发光。

The spontaneous fission is primary factor restricting numbers of transuranium elements .

超铀元素的存在受到诸多因素的限制，而自发裂变是限制超铀元素数目的最主要因素，从自发裂变限制方面分析，超铀元素的存在界限大体在Z＝120号元素以内。

For developing a method to reduce the emanation coefficient of Rn in materials, emanation coefficient of Rn in geological uranous materials such as zircon, uranium-bearing ore, etc is measured. Heating is used to study the effect of heating temperature on emanation coefficient of Rn.

通过了解锆英砂、铀矿粉、石英砂铀矿粉混合物等含铀地质材料中222 Rn的析出情况，探索了降低这些材料中氡射气析出率的方法，并应用灼烧法研究了灼烧温度对上述材料中氡射气析出率的影响。

Results showed that the amount of tritium residual in the glass uranium was 2.68%, namely there was (0.0308±0.0003) mmol tritium per gram uranium. The standard deviation of PVT measurement method based on the state equation of the ideal gas was less than 0.95%, when the pressure was between 1500 and 133332 Pa.

直接测量法测量铀床的氚残留量的结果如下：铀床的氚残留量为2.68%，即每克铀含(0.0308±0.0003) mmol 氚气；当压力读数在1500～133332 Pa之间时，基于理想气体状态方程的测量方法的标准差小于0.95%。

Examing neutron integral flux is an important part of fission track technique, and determining neutron integral flux by using uranium standard glass is recommended as a mainmethod by international Fission Track Standardization Group for age-dating.

监测中子积分通量是裂变径迹技术的重要组成部分。铀玻璃监测中子积分通量是国际裂变径迹定年标准化工作组推荐的重要方法之一，铀玻璃测定法还普遍用于测定样品中的铀含量及其空间分布。

In order to separate trace plutonium from uranium matrix for subsequent mass spectroscope determination of the former,an extraction chromatographic method composed of a TBP extraction resin column and a cationic exchange resin column was developed.

为了从铀基体中分离痕量钚，采用由TBP色层柱和7402季铵盐色层柱组成的萃取色层法及低本底α谱仪对模拟铀样品中铀钚分离方法进行了研究，并确定了分离流程的条件；对影响流程分离效果的主要因素，如料液和洗涤液酸度、流速、解吸液浓度等进行了研究，确定了最佳分离流程。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了