Do a trial run with no permanent changes. Use this to see what rclone would do without actually doing it. Useful when setting up the sync command which deletes files in the destination.
进行一次试运行,不进行任何永久性更改。使用这个来看看rclone会做什么,而不实际去做。在设置同步命令时很有用,可避免删除目标中的文件。