利用稳定性碳、氮同位素技术是用于牛肉产地溯源的有效方法。
The technology of stable C, N isotope ratio is an effective method for geographical origin traceability of beef.
在土壤排水良好、氧化的地下水环境中，地下水的氮同位素组成反映了源的特征。
Nitrogen isotope compositions of groundwater reflect characteristics of contamination sources in the environment of well-drained soils and oxygenated ground waters.
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。
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。
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.
另外碳氮同位素及其比值在当前的河流有机质生物地球化学研究中仍起着非常重要的示踪作用。
In addition, carbon and nitrogen isotope and its ratio was important indicator in the riverine biogeochemistry study.
但是空气中的氮气中的氮原子却会被一个叫做同位素的有着不同数量中子的氮原子所替换。
But the nitrogen in the air was replaced with a nitrogen atom with a different number of neutrons, called an isotope.
科学家认为重氮来自一颗彗星，而重氧则是来自行星形成的自然过程，这一过程把更轻的氧同位素留在了星云中，形成了太阳。
Scientists say the excess heavy nitrogen could have come from a comet. And the heavier oxygen from a natural process that left more of the light isotope in the part of the nebula that made the sun.
专家们说相关辐射危险性很小，因为氮的同位素氮16只会存在5秒钟。
Experts have played down the dangers, arguing that the isotope of nitrogen known as nitrogen-16 lasts for only five seconds.
同位素示踪法着重阐述了较先进的碳、氮、氧和铅同位素的示踪。
The isotope tracer method presents the advanced method of carbon isotope, nitrogen isotope, oxygen isotope and Pb tracer.
这些发射性元素包括：氮16（空气中氮元素的放射性同位素）。
Those radioactive elements are N-16 the radioactive isotope (or version) of nitrogen (air).
这些发射性元素包括：氮16（空气中氮元素的放射性同位素）。
Those radioactive elements are N-16 the radioactive isotope (or version) of nitrogen (air).
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