conic section

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conic section

BrE

/ˌkɒnɪk ˈsekʃn/

NAmE

/ˌkɑːnɪk ˈsekʃn/

(

also conic

)

noun

(

geometry 几何

)

a shape formed when a flat surface meets a

with a round base 圆锥曲线；二次曲线