割线的英文：
secant

参考例句：
  • A secant is defined as line passing through two points of the curve.
    割线的定义是一条通过曲线上两点的直线。
secant是什么意思：
a. 割的,切的,交叉的
n. 割线,正切
  • The secant of the complement of a directed angle or arc.
    余割有向角的余角或弧的余割
  • A secant is defined as line passing through two points of the curve.
    割线的定义是一条通过曲线上两点的直线。

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