the angle at which a ray, beam, or particle path turns aside or diverges from its original straight-line direction

在磁场中，带电粒子的偏转角与其动量密切相关。

the angle between the heading of a vehicle and its actual track, especially due to wind or currents in navigation

飞行员必须时刻关注侧风引起的偏转角，以防偏离航线。