The measure technology of multi-channel nuclear energy spectral is the basis of matter composition analysis and radioactivity detection by way of nuclear analysis method.

多道核能谱测量技术是用核分析方法进行物质成分分析和放射性检测的基础。

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Werner Heisenberg advanced a theory of nuclear composition. w.

海森堡提出一个关于原子核组成的理论。

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Nuclear spectrum measurement is one of the important methods for material composition analysis and radioactivity measurements.

核能谱测量是进行物质成分分析与放射性测量的重要方法之一。

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Joseph De Trani, former head of the National Counterproliferation Center, predicted U.S. intelligence would determine the size and composition of the nuclear device in one to three days based partly on radioactive elements released into the environment.

NPR: NKorean Nuclear Test May Be Intelligence Windfall

The size and composition of U.S. nuclear forces must be determined by the nature and complexion of our deterrent requirements.

CENTERFORSECURITYPOLICY: Center For Security Policy

"We can and will change the size, the composition, the character of our nuclear forces in a way that reflects the reality that the Cold War is over, " Bush said.

CNN: Bush suggests junking missile treaty with Russia