求翻译：物质的磁性是由组成物质基本粒子的磁性的宏观反映。原子是组成物质的最小单元，而原子又由原子核和电子组成，原子核具有微小的磁矩对原子磁矩几乎无贡献，因此原子的磁矩主要来源于核外电子。经典的原子波尔模型认为核外电子绕核作轨道运动，轨道运动产生的磁矩是原子磁矩的第一个来源；与此同时，电子自身也存在自旋，自旋产生的自旋磁矩是电子磁矩的另一个来源。这样原子的总磁矩可以看做是电子轨道磁矩和自旋磁矩构成。是什么意思？

The magnetic material is made ​​of a magnetic material composition of elementary particles reflect macro .

material of the magnetic is consist of material particles of the magnetic of the macro. Atomic is the formation of material in the small unit, the atoms and the atomic nuclei and electronic composition, the nucleus has a small Magnetic moment of the atomic Magnetic moment almost no contribution to t

Material magnetism is by is composed the material fundamental particle the magnetic macroscopic reflection.The atom is composes material the smallest unit, but the atom is composed by the atomic nucleus and the electron, the atomic nucleus has the small magnetic moment not to have the contribution n

The magnetic material is composed by the magnetism of elementary particles of matter reflect macro. Composed of atom is the smallest unit of matter, atoms are made up of a nucleus and electrons, nuclei with the microscopic magnetic moments of Atomic magnetic moments are almost no contribution, and t

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