Secant
01
割线, 正割线
a line that crosses a curve at least at two distinct points
例子
The secant of the curve intersects it at two different points, forming a distinct angle.
曲线的割线在两个不同的点与之相交，形成一个明显的角度。
02
正割, 正割函数
ratio of the hypotenuse to the adjacent side of a right-angled triangle
