1. 在COBOL系統(tǒng)中，由一個數(shù)據(jù)項、算術(shù)表達式或條件表達式表示的信息。
   In the COBOL system, the information represented by a data item, arithmetic expression, or conditional expression.
2. 方括弧，中括號符號之一，用于托住一手寫或印刷或標明被視作單一數(shù)量單位的數(shù)字表達式
   One of a pair of marks, [ ], used to enclose written or printed material or to indicate a mathematical expression considered in some sense a single quantity.
3. 一種常數(shù)、變量、函數(shù)名或表達式。
   A constant, variable, function name, or expression.
4. 被除數(shù)被另一個數(shù)除的表達式；被除數(shù)
   An expression to be divided by another; a dividend.

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