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双曲线的定义和许多性质与椭圆类似,类比是学习双曲线定义和性质的好方法．渐近线揭示了双曲线图形的变化趋势,是有关双曲线试题中的“活跃分子”．可以说,把握渐近线是学好双曲线的关键．
Hyperbola definition and many properties are similar to ellipses, and analogy is a good way to learn hyperbolic definitions and properties. The asymptote reveals the changing trend of the hyperbolic graph and is the “active molecule” in the hyperbolic test questions. It can be said that grasping the asymptote is the key to learning the hyperbola.