It provides a hint of the time remaining in the operation, and the dialog uses animation to show paper documents flying out of the folder on the left into the folder (or wastebasket) on the right.

• 其中提供了操作剩余时间的线索，并使用动画显示文档从左侧的文件夹飞到右侧的文件夹（或垃圾箱）。