以后的三十年里，物理学发生了天翻地覆的变化：电子、原子核、放射性、量子理论、相对论相继出现。
The next three decades turned physics on its head, with the discovery of electrons, atomic nuclei, radioactivity, quantum theory and the theory of relativity.
本文以氢原子为例，讨论并定量计算了在磁场中电子绕原子核运动角频率的变化。
Taking example for hydrogen atom, We discuss and quantitatively compute the change of the angular frequency of an electron moving around the nucleus in a magnetic-field.
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