Primary Expression 表达式 ; 基本表达式 ; 基本运算式
primary expression regions 表情特征区域
primary expression operator 主表式运算子
Simplicity: Many members of the working group considered simplicity of expression and ease of understanding to be primary goals of our language design.
简单性：工作组的许多成员认为表达的简单性和易于理解是设计该语言的主要目标。
As DB2 9 supports XQuery as primary language, the following XQuery expression can be executed in a DB2 command window.
由于DB 2 9将XQuery作为主要语言，在DB 2命令窗口中可以执行以下XQuery表达式。
Leave the JSF expression {param.empno} as the primary key value.
使用JSF表达式(param . empno)作为主关键字的值。
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