对视频而言，如果你想看到连续的画面，那刷新率至少每秒要进行25次。
For video, that needs to happen at least 25 times a second if the eye is to be fooled into seeing continuous motion.
数字图像由于其分辨率高、像素数目多，存储时所需的容量相当大，而且要得到平滑连续的画面效果，对速度的要求也是相当高的。
Because of high resolution rate, great amounts of pixels, enormous memory capacity is necessary, and smoothing continuous image makes high speed a must.
就像随着时间的推移一个演员连续拍摄12小时画面或删除这些画面。
An actor was actually filmed for 12 hours continuously painting or erasing the Numbers as time progressed.
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