理论基础 lǐlùnjīchǔ theoretical foundation Definitions Defs Origin Strokes Stroke Words Sentences Sents 理论基础 理論基礎 lǐlùnjīchǔ theoretical foundation The core ideas or principles that a theory is built upon
理论基础 理論基礎 lǐlùnjīchǔ theoretical foundation The core ideas or principles that a theory is built upon
