在正常条件下，原子含有每周围的质子能级两个电子，与纺纱在相反方向上的电子。
Under normal conditions, atoms contain two electrons per energy level surrounding their protons, with the electrons spinning in opposite directions.
建议利用三能级级联型介质实现从正常色散到反常色散的变换。
We suggest that a three-level cascade medium be used to achieve the switching from normal dispersion to anomalous dispersion.
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