拐点
guǎi diǎn
基本释义
  1. 把曲线上向上凹的弧从向下凹的弧分开或者相反地分开的点
  2. 见反挠曲点
英文翻译
  1. inflexion point (math., a point of a curve at which the curvature changes sign)
  2. turning point
  3. breaking point