Ellipse

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GRE

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[编辑] 解释

[编辑] GRE 红宝书

  • n.椭圆 ( 形)
  • [英] n.椭圆 ( 形) ( oval)
  • [记] el+lipse ( 离开) -> 离开中心 -> 不圆 -> 椭圆

[编辑] Webster Collegiate

noun

  • Etymology: Greek elleipsis
  • Date: circa 1753
  • 1.
    • a. oval
    • b. a closed plane curve generated by a point moving in such a way that the sums of its distances from two fixed points is a constant ; a plane section of a right circular cone that is a closed curve
  • 2. ellipsis


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