割線的英文：
secant

參考例句：
  • A secant is defined as line passing through two points of the curve.
    割線的定義是一條通過曲線上兩點的直線。
secant是什么意思：
a. 割的,切的,交叉的
n. 割線,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.
    割線的定義是一條通過曲線上兩點的直線。

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