Disk Operating System (DOS) is a program that controls the transfer of data to and from a hard or floppy disk, frequently combined with the main operating system.是什么意思_Disk Operating System (DOS) is a program that controls the transfer of data to and from a hard or floppy disk, frequently combined with the main operating system.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句