go/fly off at a tangent
1. 突然离题
It's not easy to follow her thought because she's always going off at a tangent.
要跟上她的思路并非易事, 因为她老是突然扯到题外去。
习惯用语go [fly] off at [on] a tangent1.突然改变方针; 突然改变话题; 突然扯到题外; 突然离开原来的思路tangent to1....的切线特殊用法arc tangent1.反正切arc-hyperbolic tangent1.反双曲正切asymptotic tangent1.渐近切线common tangent1.公切线conjugate tangents1.共轭切线cuspidal tangent1.尖点切线Darboux's tangent1.达布切线dielectric loss tangent1.介质损耗角正切, 介质衰耗因数double tangent1.二重切线dynamic mechanical loss tangent1.动态力学损耗正切hyperbolic tangent1.双曲线切线; 双曲正切inflectional tangent1.拐切线loss tangent1.损耗角正切, 损耗因数multiple tangent1.多重切线natural tangent1.正切真数peak slope tangent1.峰斜切线simple tangent1.单切线simple slope tangent1.峰斜切线singular tangent1.奇切线triple tangent1.三重切线unit tangent1.单位切线tangent to curve1.曲线起点tangentto helix1.螺旋切线