Through gestalt ( our innate rules of visual perception ) , an additional 15 visual elements are added to the layout : the centerline , each background box , and each horizontal line .

通过格式塔（人们的先天视觉感知规则）可知，另外还有15个视觉元素也被一同加到布局中：中线、每个有背景的方块，每个水平线。

An implementation principle using this mechanism design is demonstrated by which the chassis centerline can approach the leading line gradually through continuously adjusting the chassis posture .

论证了在这种机构设计下通过不断调整底盘姿态的方法可以让底盘中心线逐渐与引导线重合的实现原理。