The spaces between the blocks are called interblock gaps . 两块之间的空隙称为组间间隙。
2.
A collection of contiguous records recorded as a unit . blocks are separated by interblock gaps and each block may contain one or more records 作为一个单位来记录的相连记录的集合。各块由块间间隙分开，而每块可以包含一个或多个记录。
