圆锥曲线是高中平面解析几何的重要内容.圆锥曲线定义是圆锥曲线的核心与灵魂,正确理解和掌握圆锥曲线的定义是解决圆锥曲线有关问题的关键。根据笔者的体会,只要抓住了圆锥曲线定义中的若干“关键点”。理解圆锥曲线的定义也就变得十分简单了. The conic curve is an important part of the analytic geometry of the high-middle plane. The definition of the conic curve is the core and soul of the conic curve. Correct understanding and mastering the definition of the conic curve is the key to solving the problems related to the conic curve. According to the author’s experience, as long as the “constrained points” in the definition of the conic curve. Understanding the definition of conic curves is also very simple.