是的，如果你的动画是一个循环动画，并且骨骼在动画中间从360度旋转回0度，你需要使用阶梯式曲线。
Yes, if your animation is a loop animation and the bone rotates from 360 degrees back to 0 degrees in the middle of the animation, you need to use a stepped curve.
但是，如果你的动画不是循环动画，或者返回0度的过程不在动画的中间，就不需要阶梯式曲线。例如，如果你想把一根骨头从0度旋转到420度，然后再回到初始角度，你可以通过在0、420和360的旋转值与本地或父轴添加键来实现，如下图视频所示。
However, if your animation is not a loop animation or if the return to 0 degrees is not in the middle of the animation, no stepped curves are required. For example, if you want to rotate a bone from 0 to 420 degrees and then back to the initial angle, you can achieve it by adding keys at 0, 420, and 360 rotation values with the local or parent axis, as shown video below:
