tangentsn.切线（tangent的复数）；相切tangentadj.接触的；相切的；离题的n.切线；正切；突然的转向[音乐]击弦金属小片.tangent-plane combination折曲构成tangent-cone approximation切线锥近似法tangent frequency modulation正切调频Tangent-control subdivision切向细分方法tangent modulus of elasticity切线弹性模量tangent to circles arithmetic圆切线算法tangent cylindrical projection切圆柱投影tangent orthogonal frame bundle切正交标架丛tangent adjacent to switch rail紧接尖轨的直线tangent circle in corner firing四角切圆燃烧