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 points simplex切点单形tangent point retarder直线点缓行器tangent supension tower直线铁塔tangent Euclidean space切欧几里得空间tangentplane projection切面投影tangent bar-mechanism切线棒机构tangent direction inlet切向进口tangent elastic modulus模量公式tangent flexural modulus正切挠曲模量tangent n-frame bundle切n标架丛