The number he was referring to, which goes by the symbol alpha and the rather more long-winded name of the fine-structure constant, is magic indeed.

他所指的数字依据字母阿尔法和一个更加冗长的精细结构常数，该数的确神奇。

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Because the Hall of Supreme Harmony was a symbol of imperial power, it was the highest structure in the nation during the Ming and Qing dynasties - no other building was allowed to be higher than it.

因为太和殿象征着皇权，所以在明清时期他是中国最高的建筑物，其他建筑都不允许高过它。

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By abstracting of relative position, orientation and topology relation between part function surfaces as a qualitative symbol set, the conceptual part structure qualitative models are presented.

通过将零件上功能表面之间的相对位置、朝向以及拓扑关系抽象成定性符号集合，建立了概念零件结构定性模型。

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