一条直线与一条弧线有两个公共点，我们就说这条直线是这条曲线的割线。与割线有关的定理有：割线定理、切割线定理。常运用于有关于圆的题中。
n. secant
adj. transversal
misc. secant line
割线 [数] secant
分割线 parting line ; split line
割线刚度矩阵 [数] [力] secant stiffness matrix
切割线 cutting line ; line of cut
切割线引导位置 Wire Guides
割线模量 secant modulus
割线钳 cutting pliers
黄金分割线 fibonacci lines ; Fibonacci retracement ; Fib Expansion Level ; Fibonacci Expansion Level
割线方法 secant method
绝缘割线器 wire cutter
选择椭圆选框工具(M)然后在分割线上面画出一个椭圆。
Select the Elliptical Marquee Tool (m) and make a selection over the divider line.
另一个与会者提出，也许幸福与痛苦之间的分割线就在于自私的享乐和有同情心的利他主义。
Maybe the dividing line between happy and unhappy is between selfish hedonism and compassionate altruism, said another participant.
这就使得布朗能够建立起他钟爱的“分割线”(有时这条线看起来甚至比它确定的内容更加重要)。
That has enabled Mr Brown to erect one of his beloved "dividing lines" (sometimes the line seems to matter more than the positions it divides).
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