Changes of nuclear mass and nuclear size cause isotope shifts.

原子核质量和大小的不同引起同位素移动。

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In this paper, We compare various shell correction terms in the nuclear mass formulas.

本文对核质量公式中的壳层修正项进行比较。

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Broken nuclei in gastric parietal cells and mucus neck cells and leak of nuclear mass could be seen under electron microscope.

透射电镜可见颈黏液细胞与壁细胞核破裂，核内物质溢出核外。

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Turner -- who backs the elimination of nuclear weapons and weapons of mass destruction -- wanted to know whether the administration has considered ridding the world of weapons of mass destruction and supporting nuclear nonproliferation, rather than pursuing a missile defense program that would cost billions.

CNN: Security adviser says U.S. must be prepared for nuclear threats

Yes we're opposed to nuclear weapons of mass destruction.

CNN: Ahmadinejad: Iran welcomes Obama overtures

He said the next stage was to confirm its exact identity using mass spectrometry and nuclear magnetic resonance analyses to produce it chemically on a larger scale.

BBC: Maggots could help in MRSA battle