... 整型变量名 integer variable name 整型变量引用 integer variable reference 简单整型不变量 simple integer invariant ...
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Expression that evaluates either a string containing the name of an environment variable, or an integer corresponding to the numeric order of an environment string in the environment-string table.
表达式，计算为包含环境变量名称的字符串，或对应于环境字符串表中环境字符串的数字顺序的整数。
The collection of session variables is indexed by the name of the variable or by an integer index.
会话变量集合按变量名称或整数索引来进行索引。
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