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介绍了光学数据存贮的基本原理。磁光存贮是目前备受重视的可擦重写光存贮技术，它在计算机外存贮设备中有着广泛的应用前景，详细介绍了磁光存贮技术的进展及未来的发展趋势。
The basic principle of optical data storage is introduced. Magneto-optical storage is an erasable and rewritable optical storage technology that has drawn much attention nowadays. It has a wide range of applications in the field of extra-computer storage devices. The progress of magneto-optical storage technology and its future development trends are introduced in detail.