Read Edit View history 相平面 xiàngpíngmiàn phase plane Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 相平面 · xiàngpíngmiàn · phase plane 2026/03/04 相平面 xiàngpíngmiàn phase plane phase plane (math., ordinary differential equations) 在动力系统中，相平面是分析二阶微分方程的重要工具。 created sense Mar 4, 2026, 02:25 AM