以下为句子列表：
英文: A group of tracks on a magnetic drum or on a magnetic disk all of which are read or written in parallel.
中文: 磁鼓或磁盘表面上的一组磁道，可以并行地对它们进行读／写操作。
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英文: Disk drives have three key components: the magnetic disk medium, which stores the information, the write-head element, which writes information onto the disk, and the read-head element, which reads the information.
中文: 磁碟机有三个主要元件：负责储存资讯的磁碟媒介、将资讯写到磁碟上的写头，以及读取资讯的读取头。
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英文: Most, if not all, of the magnetic disk drives used in today's computers employ GMR read-head sensors to detect the magnetic bits of stored information.
中文: 现在，绝大多数电脑里的磁碟机，是用GMR的读取头来侦测储存资讯的磁位元。
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英文: Pertaining to read/write heads in magnetic disk systems that do not usually touch the disk surface.
中文: 修饰说明与磁盘系统的读／写头相关的一种术语，在该系统中读／写头通常不接触盘面。
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