A CD-ROM is a CD on which a very large amount of information can be stored and then read using a computer. CD-ROM is an abbreviation for "compact disc read-only memory." 只读光盘
noun [专属名词]只读光盘驱动器(Compact Disc Read - Only Memory)
A single CD-ROM can hold more than 500 megabytes of data. 单单一张只读光盘就能存储500多兆的资料。