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。
Unit block
英语例句库
英语百科
Unit block
A unit block is a type of standardized wooden toy block for children. Known also as standard unit blocks or kindergarten blocks, these building blocks are common in preschools and some kindergarten classrooms in the United States.
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