Read Edit View history 曲面 qūmiàn curved surface Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 曲面 · qūmiàn · curved surface 2026/03/04 曲面 qūmiàn curved surface a surface that is curved or a mathematical surface in three-dimensional space 球体是一个闭合的曲面。 noun created sense Mar 4, 2026, 02:25 AM