Of concern in the current situation is ionizing radiation, which is produced by spontaneously decaying heavy isotopes, such as iodine 131 and cesium 137.

目前情况下值得忧虑的是电离辐射，它由重同位素——如碘131和铯137——自发衰变而生成。

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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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Fusing heavy hydrogen isotopes requires lots of energy, partly because the nuclei are positively charged and repel each other.

融合重氢同位素需要大量能量，部分原因是因为原子核带正电并相互排斥。

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By analysing the isotopic composition of hydrocarbon molecules from plant waxes of the period, he found what looks like a spike in the amount of recently non-biological carbon (which has a distinctive ratio of light isotopes to heavy ones), lasting between 10, 000 and 20, 000 years.

ECONOMIST: A geological burp may have led to the dinosaurs�� domination