基本搜索允许您使用+和-,但不能使用布尔运算符或更复杂的表达式。
Basic Search allows you to use + and - but you can not use Boolean operators or more complex expressions.
表达式节点支持包含算术和布尔(真或假逻辑)运算符的简单表达式。
Expression nodes support simple expressions involving arithmetic and Boolean (true or false logic) operators.
而子表达式又可使用and、or和not逻辑运算符组合起来。
And the subexpressions can be combined using the and, or, and not logical operators.
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