自动使用RAR备份文件夹。这是一个用bat写的批处理文件，能够自动备份备份经常使用的文件来和项目。-RAR backup folder automatically. It is written in a batch file with the bat that can automatically back up back up frequently used files to and projects.

说明：压缩包里说明了如何利用批处理文件拷贝文件和文件夹，并提供例子-Descr iption: compression bag to illustrate how to use a batch file to copy files and folders, and provide examples