tangential fibre

例句：

1. 1. The angle of the roof is tangential to the wall.
   屋顶与墙成切线角度。
2. 2. The tangential line of a circle intersects the circumference at two points.
   圆的切线与半径相交于两点。
3. 3. The tangential force is the force that acts at the point of contact between two bodies.
   切向力是两个物体接触点处作用的力。