铀

Iran says its uranium enrichment is for peaceful purposes, to provide fuel for nuclear power.

伊朗说铀浓缩是为了和平的目的，为核能反应提供燃料。

Fulton differs from the standard reactor because it uses graphite interlaced with uranium for fuel, like the very first critical nuclear "pile" built by Enrico Fermi and his colleagues under the football stadium at the University of Chicago.

"富尔顿"反应堆不同于常规反应堆，因为它采用石墨连同铀作为燃料，类似于美籍意大利物理学家恩里科-费米及同事在芝加哥大学足球场地下建造的世界上第一座核反应堆。

To treat with an oxalate or oxalic acid .

铀盐和草酸反应产生的一种盐。

Ordos Basin ; evolution ; basement ; central paleo-uplift ; uranium ; oil and gas ; paleogeography

鄂尔多斯盆地；演化；基底；中央古隆起；铀；油气；古地理

In this parer, the features of hot extruding and upsetting on the unsymmytrical shaft parts have been analyzed.

本文分析了非对称轴类零件的热挤镦成形特点，设计了一套适合挤镦成形非对称轴类件的模具装置该装置已用于转向摇臂铀和制动蹄的精锻生产。

In order to determine the content of hydrocarbons and halohydrocarbons in uranium hexafluoride,the first step is to passivate the inlet system and ion source of mass-spectrometer.

了测定六氟化铀中烃和卤代烃的含量，首先要对进样系统和质谱计的离子源进行充分的钝化。样品必须全部汽化后方可通入质谱计，否则分馏效应将严重歪曲测量结果。

Air is perfectly elastic .

镭和铀是放射性很强。

It is the 26th artificial element heavier than uranium to have been added to the periodic table.

它是第26个在元素周期表上由人工合成的超铀重原子。

Base on above studies, some conclusions were obtained as follows:(1) ore-forming background of the studied ferromanganese crusts are mainly controlled by intensity of Antarctic Bottom Waters and variations of material source;(2) it is confirmed that the ferromanganese crusts are mainly hydrogenetic and their composition are affected by volcanic and continental material simultaneously; there are no obvious phosphatization reconstruction and element reaction occurred in them, so they have important paleoceanological significance;(3) from researches on element occurrence modes in the new-type ferromanganese crusts and the lying sediments, it is proposed that there is no great biological affection on the crusts formation and their composition mainly came from the adsorptive action of the ferromanganese oxides in them;(4) two major types of ore-controlling factors are identified through compilation of ore-controlling factors, which are geological and oceanic factors;(5) considering the long-term variation trends of the crusts composition, combing the U-series and 10Be isotope dating results, it is proposed that the ore-forming processes of ferromanganese crusts in the studied areas can be divided into three major stages (5.6~2.8 Ma, 2.8~2.7 Ma and since 2.7 Ma), and then the activities of AABW since the Late Miocene, changes of input flux coming from volcanic and continental material are confirmed.

通过研究，得出如下结论：(1)研究区铁锰结壳的成矿背景主要受控于南极底流强弱及物源供给的变化；(2)证实铁锰结壳主要为水成成因，同时其物质组成也受一定程度的火山和陆源物质的影响；结壳自形成以来没有遭受到明显的磷酸盐化等成岩后期改造和元素再迁移，具有重要的古海洋学意义；(3)通过新型铁锰结壳及下伏沉积物元素赋存状态的研究，认为生物作用对研究区结壳的形成并没有很大的直接影响，其物质成分主要来自于结壳中铁锰氧化物的吸附作用；(4)在控矿要素的研究中，归纳出了地质与海洋两大类结壳控矿要素；(5)根据结壳成分长周期变化趋势，结合铀系和10Be测年结果，将研究区结壳的形成过程划分为三个主要阶段(5.6~2.8 Ma，2.8~2.7 Ma和2.7 Ma以来)，并确定了晚中新世以来研究区南极底流的活动情况、火山和大陆来源物质输入量的变化。

Using a very simple system consisting of uranyl solution and solid thioaeefamide, we have got pitchblende successfully.

实验是在只有六价铀与硫代乙酰胺存在的非常简单的体系中进行的。

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。