The formation of TCM theoretical system can be traced hack to the period of the warring States and the Qin and Han Dynasties.

中医理论体系的形成可追溯到战国和秦汉时期。

Treatment based on syndrome differentiation, another important feature of the theoretical system of TCM, is a basic principle in TCM for understanding and treating disease.

中医辨证治疗是中医理论体系的另一个重要特征， 是中医认识和治疗疾病的基本原则。

This theory confirmed Ptolemaic astronomy but  grounded this heliocentric approach in a more robust theoretical system. The Catholic Church famously opposed his conclusions and insisted that  Earth stood at the center of the universe.

该理论证实了托勒密天文学，但将这种以日心为中心的方法建立在一个更强大的理论体系中。众所周知，天主教会反对他的结论，并坚持认为地球是宇宙的中心。