Read Edit View history 半长轴 bànchángzhóu semi-major axis Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 半长轴/半長軸 · bànchángzhóu · semi-major axis 2026/03/04 半长轴 / 半長軸 bànchángzhóu semi-major axis half of the major axis of an ellipse or the longest radius of an orbit 椭圆的半长轴通常用字母a表示。 created sense Mar 4, 2026, 02:25 AM