If the player lets the mouse button go, it will stop, but you do not want to stop right away since the animation will pop in the middle of the loop.

如果玩家释放了鼠标左键，循环就会停止。但是你应该不想让动画在播放到一般的时候就突然中断。

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Initially, image processing and display was very time consuming: Several hours were required to render an animation loop for viewing.

起初，图像处理和显示非常耗时：再现一个动画循环需要几个小时。

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