These motion effects not only represent the direction of motion but also set off the atmosphere by contrast.But, for drawing these effects animators need to spend extra time.

• 这些效果不仅是为了表现物体的运动方向，也为了能更烘托出画面的气氛，但往往在动画制作的流程中，动画师需花费不少额外的时间来完成这些效果。