Two types, or isotopes, of hydrogen are used - deuterium and tritium.
它使用两种类型，或称同位素，的氢——氘和氚。
The best fuels for fusion are two types, or isotopes, of hydrogen - deuterium and tritium.
最好的核聚变材料有两种，即氢的同位素——氘和氚。
Radionuclides or isotopes for medical or industrial purposes, such as Cobalt 60, Caesium 131 and lodine 132.
放射性核素或核素用于医疗或工业目的，例如：钴60、铯131和碘132。
Radionuclides or isotopes for medical or industrial purposes, such as Cobalt 60, Caesium 131 and lodine 132.
放射性核素或核素用于医疗或工业目的，例如︰钴60、铯131和碘132。
There are different kinds, or isotopes, of uranium, and the type used in nuclear power plants is called uranium-235, because these atoms are easiest to split in two.
铀有许多不同的种类，或称同位素，而在核电站中所使用的是铀235这一类，因为这些的原子最容易一分为二。
Such anomalies are due to the relative abundance of the "isotopes" or varieties of each element.
这种反常现象是由于同位素比较丰富或者各个元素比较多样化。
"But years of observation of geochemistry have taught me that caution is wise," he says, "whether it be for the earlier claims on water or this latest work on chlorine isotopes."
“但是，多年来对地球化学的观察让我知道谨慎是明智的，”他说，“无论是这次对于氯同位素的研究还是早期对于水的研究都需要谨慎。”
They are proud of having developed a workable bomb and built their own reactors, despite sanctions that prevented them from importing technology or from attending conferences to discuss isotopes.
他们对研发成功可使用的核弹并建造自己的反应堆感到自豪，尽管之后的制裁阻止他们输入技术并出席讨论同位素的会议。
Now, a team has attempted to solve the mystery by comparing the ratio of two isotopes, or forms, of chlorine in lunar and terrestrial rocks.
目前，一个研究小组打算通过对比月球和地球岩石中氯的两种同位素，或两种形式的氯来解决这个疑团。
The uranium or plutonium isotopes are referred to as "fissile," which means we can use them to induce fission by bombarding them with free neutrons.
铀或钚的同位素被称为裂变材料，即我们可以利用自由中子去轰击它们来产生裂变反应。
In this scenario, hydrogen would no longer be stable, but its slightly heavier isotopes deuterium or tritium could be.
在这个设定中，氢不再是稳定的，但是其更重些的同位素氘和氚却是稳定的。
These fragments were then analysed to test for particular isotopes, or forms, of the metallic element strontium, which can reveal the geological region where individuals were raised.
对这些珐琅碎片进行金属元素锶的同位素测试，这种元素可以揭示出个体所成长的地理区域。
As the Economist went to press it was unclear whether Iran would accept or haggle over the deal, which would keep in operation a research reactor that makes medical isotopes.
本期《经济学人》付印之前，伊朗是否接受或讨价还价这项片面协议交易尚不明朗，该协议将使制造医学上同位素的一座研究反应炉维持运转。
But the new study shows that the ratio of oxygen and nitrogen isotopes found in the solar wind is different from the ratio here on earth, or on the moon or Mars.
不过这一最新的研究发现，太阳风当中的氧和氮同位素比例与地球、月球或火星上的比例不同。
Or they may move into the area of health physics to help physicians to find new ways to use atomic isotopes to diagnose and treat disease.
他们也能进入保健物理学领域，帮助内科医生运用原子核素找到诊断和治疗疾病的新途径。
Isotopes could also be used in pet food or as a means to protect workers or soldiers from radiation.
同位素也可以用于宠物食品或者作为保护工人或者士兵免受放射。
"The uranium or plutonium isotopes are referred to as" fissile, "which means we can use them to induce fission by bombarding them with free neutrons."
铀或钚的同位素被称为裂变材料，即我们可以利用自由中子去轰击它们来产生裂变反应。
So those living close to the sea, or in corridors suffering frequent storms, will tend to absorb more of the heavy isotopes in their hair.
所以住在海边，或者在风暴频发的走廊地带的人头发会吸收更多重同位素。
But years of observation of geochemistry have taught me that caution is wise, "he says," whether it be for the earlier claims on water or this latest work on chlorine isotopes.
“但是，多年来对地球化学的观察让我知道谨慎是明智的，”他说，“无论是这次对于氯同位素的研究还是早期对于水的研究都需要谨慎。”
But the new study shows that the ratio of oxygen and nitrogen isotopes found in the solar wind is different from the ratio here on earth, or on the moon or Mars.
但最新的研究显示太阳风中氧氮同位素比例与地球、月球或是火星上的比例并不相同。
Experimental results indicate that the adsorption capacity of hydrogen isotopes on 601 is higher than that on AC or CNF at liquid nitrogen temperature and CNF has the smallest adsorption capacity.
实验结果表明：601对氢同位素的吸附量为最高、AC次之、CNF最小，并存在明显的同位素效应；
It can label isotopes as naturally occurring, industrial, medical, or special nuclear material; corresponding alarms indicate the severity of the threat.
它可以将核素标记为天然物质、工业、医药、或者特殊的核材料物质，并通过相应的标签警告指明该物质的危险性。
Accuracy quantification would be feasible by analyzing the peak intensities of every same peptide pairs labeled with light or heavy isotopes by the mass spectrometry.
通过比较标记前后同一肽段的质谱峰值变化，可以实现对蛋白质的精确定量。
Accuracy quantification would be feasible by analyzing the peak intensities of every same peptide pairs labeled with light or heavy isotopes by the mass spectrometry.
通过比较标记前后同一肽段的质谱峰值变化，可以实现对蛋白质的精确定量。
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