The arrangement or layout of data in or on a data medium.

数据媒体之中或之上数据的排列或布局.

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To remove data from a data medium, leaving the medium available for recording new data.

擦除数据记录媒体上的数据, 从而使媒体可记录新的数据.

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In a character string, to reduce the space taken on a data medium by repetitive characters.

减少字符串中由于字符的重复出现而占据的数据媒体空间.

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An opening in a data medium or device such as a card or magnetic core.

诸如卡片、磁芯等数据媒体或设备上的开孔.

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A data medium in or on which data have never been recorded, e . g.

一种数据介质,在其内或其上从未记录过数据.

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