建构规则运算式的方式非常像是在建立算术运算式。
Regular expressions are constructed much like arithmetic expressions are created.
如果一个运算式中使用多个算术运算子，查询和检视表设计工具会依照以下的运算子优先顺序处理运算式。
If you use more than one mathematical operator in an expression, the Query and View Designer processes the expression according to the following operator precedence.
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