铀的

Mineralogical characteristics, formation environments and environmental mineralogical significance of uranium acyl arsenate minerals in China are discussed systematically in this paper.

对我国产出的铀酰砷酸盐矿物的矿物学特征、形成环境和环境矿物学意义进行了较系统的综合论述。

It is important that studying gamma ray spectrometry of field rocks and soil in the earth抯 crust. Their energy range are mainly 30-3000keV, they contain abundant information of natural radioactive nuclides, such as uranium, thorium, potassium, etc, and of artificial radioactive nuclides from nuclear engineering activity, such as cesium, americium, cobalt, etc, and of the results in interaction between gamma ray and earth抯 crust.

国外近年已经生产出大于256道的伽玛射线能谱仪，但由于仪器应用滞后于仪器研究，且仪器稳谱未完全解决，获取全谱信息困难，加之对低能谱段的认识不足等原因，致使野外应用仍然滞留在仅限于测定铀钍钾含量的伽玛能谱测量水平上。

Although supplies of uranium fuel were known to he limited and might become exhausted in half a century, the nuclear power plant has for a long time been a favorite project.

尽管大家知道铀燃料的供应是有限的，而且可能在半个世纪内耗尽，原子能发电站多年来却一直是特别受人喜爱的项目。

This type of green luminescence is quite common in agate and chalcedony, and it is known to be caused by traces of uranium in the material.

这种类型的绿色发光的现象比较普遍，玛瑙和玉髓，并已知会造成痕迹的铀物质。

This atom,with 92 electrons spinning about the closely packed and complex nucleus,is the element uranium,which seems to be the most complicated of the natural atoms.

这一有着92个电子围着又密集又复杂的原子核旋转的原子，就是元素铀。它似乎是天然原子中最复杂的原子了。

His first task was to calculate the critical mass of uranium-

他的第一份工作是计算铀-235的临界质量，也就是维持链式核反应所需的质量。

The project area is also prospective for uranium and manganese mineralisation and the proposed drilling will also test the potential for these two metals.

项目区还潜在铀，锰矿化和拟议的钻井也将测试的潜力，这两个金属。

"Machines that receive their input energy from a natural source (such as air currents, moving water, coal, petroleum, or uranium) and transform it into mechanical energy are known as prime movers ; examples include windmills, waterwheels, turbines, steam engines, and internal-combustion engines."

机械从自然资源(如气流、流水、煤、石油或铀)接收能量，将之变换为机械的能量，此即所谓的原动机，例如风车、水轮、涡轮机、蒸汽机、内燃机。

"Machines that receive their input energy from a natural source (such as air currents, moving water, coal, petroleum, or uranium) and transform it into mechanical energy are known as prime movers; examples include windmill s, waterwheels, turbines, steam engines, and internal-combustion engines."

机械从自然资源(如气流、流水、煤、石油或铀)接收能量，将之变换为机械的能量，此即所谓的原动机，例如风车、水轮、涡轮机、蒸汽机、内燃机。

Primary uranium assets in North America or Australia's Northern Territories hold the lowest risk.

初级铀资产北美或澳洲的北方领土举行的风险降至最低。

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。