Beside having similar properties to mollusc shell nuclei, the new pearl nuclei possess some advantages such as white color, strong luster, round shape and cheap cost.

这种珠核物化性质与现有贝、蚌壳珠核相近，具有颜色白、光泽强、外形圆和价格低廉等特点。

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Nuclei with closed-shell have spherical symmetries.

闭壳核具有球对称性。

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Because protons and neutrons in light nuclei fill the same shell, it is necessary to introduce isospin when the light nuclei are described by the interacting boson model (IBM).

由于在轻核中质子与中子处于同一壳，当用相互作用玻色子模型(ibm)描述轻核时，必须引入同位旋。

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Under the laws of quantum mechanics, the nuclei of atoms have shell-like structures analogous to the spheres in which given numbers of electrons exist in certain orbits around the nucleus.

ECONOMIST: Nuclear physics