| 单词 | tangent |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔arc tangent〕The inverse function of the tangent of an angle.反正切：角度正切的反函数美国传统〔continue〕Continue the chord until it meets the tangent.把弦延长至切线。英汉大词典〔cotangent〕The tangent of the complement of a directed angle or arc.余切：有方向角或弧的补角的正切美国传统〔cotangent〕The reciprocal of the tangent of an angle in a right triangle.余切：直角三角形中角的正切的倒数美国传统〔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〔envelope〕Mathematics A curve or surface that is tangent to every one of a family of curves or surfaces.【数学】 包络线，包络面：一条曲线或一个曲面，与一组曲线或曲面中的每一曲线或曲面保持正切美国传统〔go off on a tangent〕It's hard to get a firm decision out of him - he's always going off on a tangent.很难从他那里得到一个明确的答复——他老是突然离题扯别的去了。剑桥高阶〔go off on a tangent〕She went off on a tangent about what happened to her last summer.她开始离题谈起了去年夏天她所遭遇的一切。韦氏高阶〔hurdy-gurdy〕A medieval stringed instrument played by turning a rosined wheel with a crank and depressing keys connected to tangents on the strings.绞弦琴：一种中世纪弦乐器，演奏时转动一个带有曲柄的涂有松香的轮子，按下连着弦上的金属针上的琴键美国传统〔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〔secant〕The straight line drawn from the center through one end of a circular arc and intersecting the tangent to the other end of the arc.正割线：从圆心引出的经过圆弧一个端点并与另一端点正切交割的直线美国传统〔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〔tangency〕The condition of being tangent.相切：彼此相切的状况美国传统〔tangent plane〕The plane containing all the lines tangent to a specified point on a surface.切面：包含与一个表面上的某一点相正切的所有直线的平面美国传统〔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〕His mind had gone off at a complete tangent.他突然想到别的事情上去了。麦克米伦高阶〔tangent〕Let's stay with the topic and not go off at a tangent.我们还是继续这个话题，不要离题吧。朗文当代〔tangent〕The conversation went off at a tangent.交谈突然偏离了正题。柯林斯高阶〔tangent〕The conversation went off at a tangent.谈话突然偏离了正题。外研社新世纪〔tangent〕The speaker went off on a tangent.那个讲演的人突然离题扯开去了。英汉大词典〔tangent〕Then his mind went off at a tangent in another direction.接着,他的思路突然一转,去想别的事情了。英汉大词典〔touch〕Mathematics To be tangent to.【数学】 与…相切美国传统〔trigonometry〕Trigonometry concerns the functions of angles, such as sine, cosine, and tangent.三角学研究的是角的函数，例如正弦、余弦和正切。剑桥高阶If someone (esp. Br) goes off at a tangent/(Am and Aus) goes off on a tangent/(Br and Aus) flies off at a tangent they suddenly change what they were talking or thinking about.突然离开原来的思路; 突然离题剑桥国际It's hard to get a firm decision out of him--he's always going off at a tangent.很难从他那里得到果断的决定----他总是离开原来的思路。剑桥国际They changed their course to something like a tangent to the earth. 他们将航线改变为差不多与地球呈正切的方向。译典通Trigonometry concerns the functions of angles, such as sine, cosine and tangent.三角学是关于角的功能的学科，例如正弦、余弦和正切。剑桥国际 |
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