Roll head gently from side to side, then forward and backward.
柔和地向两边拉伸脖子，然后同样向前低头向后仰脖。
Roll shoulders forward and backward.
轧辊的肩膀前进，后退。
Come to a complete stop. Do not let your vehicle roll forward or backward.
首先要完全停车，车辆不能向前或前后滑动。
Come to a complete stop. Do not let your vehicle roll forward or backward.
首先要完全停车，车辆不能向前或前后滑动。
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