In optical recording, a microscopic depression made on the disk surface by the recording laser beam. Recorded information is contained in the pits and the Spaces between pits-lands.
在光记录技术中，由记录激光束在光盘表面上烧蚀的一个微小凹陷区。记录信息包含在凹区和凸区中。
Magnetic disk is a flat circular plate with a magnetizable surface layer on which data can be stored by magnetic recording.
磁盘是一种带有可磁化层的扁平圆盘，在其表层上可用磁记录方式存储数据。
In optical recording, a microscopic depression made on the disk surface by the recording laser beam.
在光记录技术中，由记录激光束在光盘表面上烧蚀的一个微小凹陷区。
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