Read Edit View history 定性理论 dìngxìnglǐlùn qualitative theory Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 定性理论/ 定性理論 dìngxìnglǐlùn qualitative theory 常微分方程的定性理论主要研究解的几何性质。 Edit Delete References Add reference No references for this word.