| 单词 | 切线 |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔continue〕Continue the chord until it meets the tangent.把弦延长至切线。英汉大词典〔curvature〕The ratio of the change in the angle of a tangent that moves over a given arc to the length of the arc.曲率：切线通过给定弧线的角度变化与弧线长度之间的比率美国传统〔cusp〕Mathematics A point at which a curve crosses itself and at which the two tangents to the curve coincide.【数学】 尖点，会切点：曲线上的一个点，曲线在该点与其本身相交，曲线的两条切线在该点重合美国传统〔line of force〕A theoretical line in a field of force, such that a tangent at any point gives the direction of the field at that point.力线：力场上理论想象线，任一点的切线指向那一点的力场方向美国传统〔normal〕Mathematics A perpendicular, especially a perpendicular to a line tangent to a plane curve or to a plane tangent to a space curve.【数学】 正交：一条垂直线，尤指一条相对一条平面曲线的切线垂直线或一条相对一条空间曲线的平面切线垂直线美国传统〔score〕To mark the surface of (meat, for example) with usually parallel cuts.切划：用平行的切线在（例如肉）的表面上做标记美国传统〔slope〕The tangent of the angle of inclination of a line, or the slope of the tangent line for a curve or surface.斜率：一条直线的倾斜角的正切或一条弧线或一个平面的正切线的斜率美国传统〔tangent line〕A line sharing a common point with a curve or surface and being the closest linear approximation of the curve or surface at that point.正切线：与一条曲线或一个平面共切于一点的一条线，而在切点处其与该曲线或平面的线性相似最为接近美国传统〔tangential〕Of, relating to, or moving along or in the direction of a tangent.正切的：属于、关于一个切线或切（面）的，沿着或向着一个切线（或切面）的方向移动的美国传统〔tangent〕A line, curve, or surface touching but not intersecting another line, curve, or surface.切线（面）：与另一条直线、曲线或另一个平面相接触但并不相交的一条直线、曲线或一个平面美国传统 |
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