Read Edit View history 二次曲面 èrcìqūmiàn quadric surface Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 二次曲面 · èrcìqūmiàn · quadric surface 2026/03/04 二次曲面 èrcìqūmiàn quadric surface quadric surface (geometry) 椭球面是一种常见的二次曲面。 created sense Mar 4, 2026, 02:25 AM