The Principate system, more than 500 years has laid a solid foundation for the imperial system.
元首制度的建立，奠定了500余年帝制的坚实基础。
However, this did not mean that senate became the appendage of princeps in the early principate.
然而，这并不意味着帝国初期的元老院已沦为元首的附庸。
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