con·ic sec·tion
noun/ˌkɒnɪk ˈsekʃn/
/ˌkɑːnɪk ˈsekʃn/
(also conic)
(geometry)- a shape formed when a flat surface meets a cone with a round base
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Topics Colours and Shapesc2圆锥曲线;二次曲线
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