In computer graphics, moving one or more segments on a display surface by translating it along a path determined by a locator. 计算机图形学中，在显示屏上移动一个或多个段，这种移动是通过将这些段沿着定位器确定的路径进行平移变换来实现的。
In computer graphics, turning all or part of a display image180 degrees about an axis in the plane of the display surface. 在计算机制图技术中，显示图象的全部或一部分对显示面所在平面中某个轴线翻转180度的处理方法。
The process of repeatedly producing a display image on a display surface so that the image remains visible. 为使图象保持可见，在显示面上反复产生该幅显示图象的过程或方法。
