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Tangent
01
切线
a straight line that touches a curve or surface at exactly one point, known as the point of tangency
02
切线
(mathematics) the ratio of the opposite to the adjacent side of a triangle that has one angle of 90°
例子
In geometry class, we learned how to draw a tangent to a circle, ensuring it only touched the circle at a single point.
The book's excursive narrative took readers on various tangents away from the main story.
She went off on a tangent about what happened to her last summer.
While discussing the book's central theme, she went off on a tangent about the author's background and other unrelated topics.
She often goes off on tangents during her lectures, sharing interesting stories but sometimes losing the main point.