Read Edit View history 二次曲 èrcìqū conic Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 二次曲 · èrcìqū · conic 2026/03/04 二次曲 èrcìqū conic a plane curve defined by a second-degree algebraic equation, such as an ellipse, parabola, or hyperbola 圆、椭圆、双曲线和抛物线统称为二次曲线。 created sense Mar 4, 2026, 02:25 AM