The influence of electronic self spin of quantum human body to the energy grade and spectrum line of sort hydrogen atom under the case without outfield was mainly discussed in this paper.

本文主要讨论在没有外场的情况下，量子人体的电子自旋对类氢原子的能级和谱线的影响；

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You can see from this picture of the 1903 World Series that there are no outfield fences, although there was likely a chalk line or a rope marking how close spectators could come to the field.

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