Each element has at least one isotope with unstable nuclei that can undergo radioactive decay.

每个元素至少有一个同位素不稳定原子核可以进行放射性衰变。

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By working backward through a decay sequence, the scientists are reasonably certain they created element 118, even though the highly unstable new atoms survived only a millisecond apiece.

通过回溯一个衰变序列，科学家们有理由确认他们创造了118号元素，即便这种高度不稳定的新元素仅仅存在了一毫秒。

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In the foundation of analyzing rainfall seepage mechanism, the finite element method is studied for unstable saturated-unsaturated seepage field.

在分析降雨入渗机理的基础上，研究了考虑降雨入渗影响的非稳定饱和—非饱和渗流场有限元分析方法。

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Being a company of utter geeks, Google called this beta test laptop the Cr-48 after the chemical name of an unstable isotope of the chrome element.

FORBES: Names You Need to Know: Cr-48

In the short term, it adds another volatile element to a dangerously unstable mix.

ECONOMIST: Ulster��s past, Ulster��s future