拐点guǎidiǎn原指数学上改变曲线向上或向下方向的点,借指事物的发展趋势开始改变的地方{point of inflection; knee point; break point; mathematical term that refers to the point where a curve on a graph moves up or down, meaning the point where the development trend of sth. starts to change}: 经济运行出现回升~。{There is an upward inflection point in economic performance.}