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现在市场上的可录光碟有两大类，一类是用780nm激光的CD系列可录光碟CD-R/-RW和另一类采用640nm激光的DVD系列可录光碟DVD-R/-RAM/-RW/+RW。前者的记录容量在780MB左右，后者约4.7GB。由于品种繁多，技术复杂，容易引起错乱。本文将对这些碟片的技术特性给以较为详细的介绍，以
There are two types of recordable discs on the market today, one is the CD series CD-R / -RW with 780nm laser and the other is the DVD series CD-R / -RAM / DVD with 640nm laser. -RW / + RW. The former recording capacity of about 780MB, the latter about 4.7GB. Due to the variety and complex technology, it is easy to cause confusion. This article will give a more detailed introduction of the technical characteristics of these discs