tangent to

基本解释

And that line is tangent to the surface.
一条与曲面相切的直线。
The direction is tangent to the trajectory.
方向就是轨道的切线方向。
The green spiral is made from quarter-circles tangent to the interior of each square, while the red spiral is a Golden Spiral, a special type of logarithmic spiral.
绿色螺旋线由内部每一个正方形和四分之一圆相切线构成，而红色的螺旋线是黄金螺旋线，它是对数螺旋线的一种特殊类型。

That limit will be some arrow we can call the velocity at the time and it will always be tangent to the curve.
那个极限也就是一个矢量,我们称之为瞬时速度,并且它总是和轨迹相切的
耶鲁公开课 - 基础物理课程节选
So the velocity at any part of the curve is tangent to the curve at that point.
曲线上任意一点的速度,都在该点和曲线相切
耶鲁公开课 - 基础物理课程节选
That means that you want to pick, ultimately, a point on this-- this line is tangent to the efficient portfolio frontier with all the other assets in it.
那意味着你会最终会在这上面选一个点-,这条直线是与有效边界相切的,后者包含了所有的资产组合。
耶鲁公开课 - 金融市场课程节选

When discussing politics and policy with your friends or dinner companions (and my hope is that they are both) it is a solid tangent when disagreements arise to go down the road of asking if they believe scarcity exists.
FORBES: We're All Economists Now: Scarcity Lessons For High School Students