The driver waits for the vertical retrace period 驱动程序需要等待垂直回描周期。
2.
The driver waits for the vertical retrace period the runtime will beam trace to prevent tearing 驱动程序需要等待垂直回描周期（运行库将实施跟踪以防止脱节） 。
3.
No attempt is made to synchronize the copy with the vertical retrace period of the display adapter , so tearing effects may be observed 由于没有尝试使复制与显示适配器的垂直回描周期同步，因此，可能会看到图像撕裂效果。
4.
Accordingly , the presentation is synchronized with the display adapter s vertical retrace and its rate is constrained by the chosen presentation interval 相应地，呈现与显示适配器的垂直回描同步，并且呈现速率受所选显示间隔的约束。
5.
This swap effect behaves like the copy swap effect except that it synchronizes the copy with the vertical retrace of the monitor so that tearing artifacts are eliminated 此交换效果与复制交换效果大致相同，只是此效果可以使复制与监视器的垂直回描同步，从而消除了图像撕裂现象。
