A collection of contiguous records recorded as a unit.Blocks are separated by interblock gaps and each block may contain one or more records.
作单位来记录的相连记录的集合。各块由块间间隙分开,而每块可以含或多记录。
A collection of contiguous records recorded as a unit.Blocks are separated by interblock gaps and each block may contain one or more records.
作单位来记录的相连记录的集合。各块由块间间隙分开,而每块可以含或多记录。
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