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单词 正切线
例句 DEFINITIVE EXAMPLES 权威例句〔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
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