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1·Natural uranium has only seven atoms per thousand of the former.

每上千个自然界的铀才只有7个原子。

2·Indeed, ninety-five percent of a spent nuclear fuel rod is natural uranium, and so it can be put right back in the ground, just as it was found.

实际上，一个用尽的核燃料棒中95%的是天然铀，因此我们可以把它重新埋入地下，就像刚发现那样。

3·Based on the experiments, a chemical procedure used for rapidly separating thorium from the natural uranium irradiated by 18o ions was developed.

在条件实验的基础上提出了一个从中能18o离子照过的天然铀样品中简便、快速地分离钍的化学流程。

4·Australia, Canada and South Africa, all with deposits of natural uranium, are reluctant to accept limits on their future rights to enrich it for profit.

拥有铀自然资源储备的澳大利亚，加拿大和南非自然不情愿接受对他们未来浓缩这些铀以赚取利益权利的限制。

5·The investigation results on natural uranium concentrations in drinking water sources, Hei River and Ba River, in Xi 'an City are presented in this paper.

对西安市生活饮用水源黑河与灞河水体中天然放射性元素铀含量进行了调查。

6·Certain countries (Australia, Canada, South Africa, among others) have reserves of natural uranium and might like to profit from enriching them before exporting them.

一些国家(澳大利亚、加拿大、南非等国)天然铀储量丰富，希望将铀浓缩后再出口获利。

7·What helium is available is depleted in helium-3 relative to what we see in the sun, because most of Earth's helium-4 is freshly made via natural radioactive decay of the elements uranium and thorium.

当氦衰变成为氦-3相对于我们在太阳里看到的那它就可用了，因为地球上多数的氦-4是通过元素铀和钍自然放射性衰变而造成的。

8·One focus was to prospect the lunar surface for natural resources, including uranium for nuclear fuel.

它的最主要任务是勘察月球表面的自然资源，包括可以用于核然料的铀。

9·That growth has transformed global energy markets and sustained higher prices for everything from oil to uranium and other natural resources that China has been consuming.

中国经济增长改变了全球能源市场，并使中国消费的每样能源，从石油到铀再到其他自然资源的价格居高不下。

10·Industrial exports include gold, mercury, uranium, and natural gas and electricity.

工业出口包括黄金，汞，铀，天然气和电力。