Read Edit View history 凹凸性 āotūxìng concavity Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 凹凸性 · āotūxìng · concavity 2026/03/04 凹凸性 āotūxìng concavity (math.) concavity 我们需要研究这个函数的凹凸性。 created sense Mar 4, 2026, 02:25 AM